Saturday

April 19, 2014

April 19, 2014

Number of results: 28,757

**Physics**

A boat is rowed directly upriver at a speed of 2.4 m/s relative to the water. Viewers on the shore see that the boat is moving at only 0.6 m/s relative to the shore (heading upriver). What is the speed of the river?
*Wednesday, October 6, 2010 at 2:19pm by Preston*

**Physics**

A boat is rowed due North at 7.0 km/h directly across a river that flows due East at 4.0 km/h. Find the boat's resultant speed.
*Thursday, April 15, 2010 at 7:34pm by Tony*

**Intermediate algebra**

speed of boat in still water ---> x mph speed upriver = x-4 mph time upriver = 24/(x-4) speed downriver = x+4 mph time downriver = 24/(x+4) 24/(x-4) + 24/(x+4) = 5 times (x-4)(x+4) 24(x+4) + 24(x-4) = 5(x+4)(x-4) 24x + 96 + 24x - 96 = 5x^2 -80 5x^2 - 48x -80 = 0 x = (48...
*Friday, November 11, 2011 at 11:38pm by Reiny*

**Maths**

Tom was floating down the river on a raft when, 1km down, Michael took to the water in a rowing boat. Michael rowed downstream at his fastest pace. Then he turned around and rowed back, arriving at his starting point just when Tom drifted by. If Michael's rowing speed in still...
*Tuesday, August 19, 2008 at 4:34am by Maybel*

**8th Grade Math**

Tom was floating down the river on a raft when, 1km lower down, Michael took to the water in a rowing boat. Michael rowed downstream at his fastest pace. Then he turned around and rowed back, arriving at this starting point just as Tom drifted by. If Michael's rowing speed in ...
*Tuesday, September 30, 2008 at 7:57pm by Lexi*

**math**

a patrol boat took 2.5 hours for a round trip 12km upriver and 12km back. the speed of the current was 2 km/h. what was the speed of the boat in still water? ps: i just need to know how to make equations from the question above. it's supposed to create equation, then use the ...
*Friday, October 15, 2010 at 11:21pm by lawrence*

**Math**

A boat travels 12 miles up a river, then returns to where it started. The trip upriver took one hour longer than the return trip. If the current is 3mph, find the speed of the boat
*Tuesday, November 20, 2012 at 10:41pm by Tonya*

**Physics**

A boat’s speed in still water is 1.95m/s . The boat is to travel directly across a river whose current has speed 1.20m/s . Determine the speed of the boat with respect to the shore. Despite, I did it like taking the sqrt (1.95^2+1.20^2) is there something wrong I did? ...
*Wednesday, October 17, 2012 at 3:13pm by Kaan*

**physics**

A boat’s speed in still water is vBW = 1.85 m/s. If the boat is to travel directly across a river whose current has speed vWS = 1.20 m/s, at what upstream angle must the boat head?
*Tuesday, November 15, 2011 at 1:01pm by ahmed*

**math**

The speed of a powerboat in still water is 35 mi/h. It is traveling on a river that flows directly south at 8 mi/h.the boat heads directly west across the river. What are the resulting speed and direction of the boat?
*Monday, April 29, 2013 at 12:24am by belkis*

**math**

A boat is rowed down a river a distance of 16 miles in 2 hours and it is rowed upstream the same distance in 8 hours. Let r represent the rate of the boat in still water in miles per hour, and let c represent the rate of the stream in miles per hour. Write the equation. What ...
*Wednesday, March 14, 2012 at 6:54pm by lea*

**math**

On Monday afternoon, Andrew rowed his boat with current for 4.5 hours and covered 27 miles, stopping in the evening at a campground. On Tuesday morning he returned to his starting point against the current in 6.75 hours. Find the speed of the current and the rate at which ...
*Wednesday, January 26, 2011 at 3:34pm by Sean charles*

**math**

20. Miguel is driving his motorboat across a river. The speed of the boat in still water is 11 mi/h. The river flows directly south at 2 mi/h. If Miguel heads directly west, what are the boat’s resultant speed and direction?
*Wednesday, December 26, 2012 at 2:31pm by bre*

**geometry**

Miguel is driving his motorboat across a river. The speed of the boat in still water is 10 mi/h. The river flows directly south at 3 mi/h. If Miguel heads directly west, what are the boat’s resultant speed and direction? Round answers to the nearest tenth.
*Monday, February 27, 2012 at 11:03am by hiba*

**science-physics **

a boat travels in still water at 2m/s. It is rowed across a river that flows at 1m/s. Determine the resultant velocity of the boat
*Tuesday, February 14, 2012 at 1:49pm by levi*

**physics**

A boat that travels at a speed of 6.75 m/s in still water is to go directly across a river and back, as shown in the figure below. The current flows at 0.50m/s At what angles must the boat be steered? How long does it take to make the round-trip? (Assume that the boat's speed ...
*Thursday, September 13, 2012 at 8:41pm by dj*

**math**

speed of boat in still water ---- x km/h speed of current ----- 2 km/h speed against current = x-2 speed with the current = x+2 time upriver = 12/(x-2) time downriver = 12/(x+2) equation: 12/(x-2) + 12/(x+2) = 2.5 hint: multiply both sides by (x+2)(x-2), simplify and you have ...
*Friday, October 15, 2010 at 11:21pm by Reiny*

**math**

Erin takes a total of 5 hours in her boat to travel a distance upriver and return downriver the same distance. If the time traveling upriver is twice the time traveling downriver, how many hours does each trip take? How do I put this into two equation and use the matrix to ...
*Tuesday, March 16, 2010 at 12:06am by Lauren*

**Physics**

A small boat is crossing a river which flows at 10km.h. The driver of the boat keeps it heading directly (at 90) away from the bank at a speed of 24 km/h relative to the water. The river is 0.5 km wide. I calculated the speed of the boat relative to land - 26km/h I calculated ...
*Tuesday, February 26, 2008 at 6:02pm by Anonymous*

**Geometry**

You are boating and heading directly west. The speed of the boat in still water is 36 mi/h. The river flows directly north at 15 mi/h. What is your resultant speed and directional?
*Monday, February 28, 2011 at 7:44pm by James*

**algebra**

The power P needed to propel a boat is directly proportional to the cube of the speed of the boat. A 100 hp engine is needed to propel a boat at 15 knots. Find the power needed to drive the boat at 20 knots.
*Thursday, March 10, 2011 at 7:19am by Jeremiah*

**math**

A speed boat is travelling from Florida to Cuba (distance of approximately 380 km), it is directly affected by the water current. Thus, the actual speed of the boat with respect to the ground is the speed of the boat (125 km/h) plus the water current speed, c. a) Develop an ...
*Monday, February 25, 2013 at 9:34pm by mehwish*

**physics**

A boat propelled so as to travel with a speed of 0.50m/s in still water, moves directly (in a straight line) across a river that is 60m wide. The river flows with a speed of 0.30m/s. How long in seconds does it take the boat to cross the river?
*Friday, October 7, 2011 at 5:44pm by lawrence*

**Math word problem check**

The Mad River flows at a rate of 3 km/h. In order for a boat to travel 78.2 km upriver and then return in a total of 8 hr, how fast must the boat travel in still water? what formula would be used to solve this problem? I used the formula of V = D/T T = D/V, you know that 78.2...
*Sunday, November 9, 2008 at 2:27pm by Shawn*

**Physics**

A boat propelled so as to travel with a speed of 0.5m/s in still water, moves directly (in a straight line) across a river that is 60m wide. The river flows with a speed of 0.30m/s. How long in seconds does it take the boat to cross the river?
*Sunday, October 13, 2013 at 3:32am by Minister Obonukut*

**math**

let spped of current be X, when the boat goes upstream, the actual speed of boat= speed of boat-speed of current;when the boat goes downstream, the speed =speed of boat+speed of current distance=speed x time upstream: (16-X)x 1/3 downstream:(16+X)x1/4 since the total distance ...
*Wednesday, September 3, 2008 at 9:34pm by ZZ*

**physics**

A boat propelled so as to travel with a speed of 0.50m/s in still water, moves directly ( in a straight line) across the river that is 60m wide. The rivers flows with a speed of 0.30m/s. How long in a seconds does it take the boat to across the river?
*Friday, April 27, 2012 at 5:47pm by Abbey*

**LA part 1**

were suppose to mark all figurative language, sensory imagery, peotic devices, and any other diction and rhetoric The something that I had noticed before clicked in the man's throat again, and he turned his back. The boat had returned, and his guard were ready, so we followed ...
*Tuesday, December 15, 2009 at 8:24pm by JD*

**physics**

a boat that travels at a speed of 6.75 m/s in still water is to go directly across a river and back . the current flows at 0.50 m/s (a) at what angle(s) must the boat be steered. (b)How long does it take to make a round trip? (assume that the boats speed is constant at all ...
*Tuesday, January 1, 2008 at 8:12pm by melissa*

**Math: Calculus - Vectors**

A boat travels at a speed of 5 m/s in still water. The boat moves directly across a river that is 70m wide. The water in the river flows at a speed of 2 m/s. How long does it take the boat to cross the river? In what direction is the boat headed when it starts the crossing. ...
*Tuesday, February 19, 2008 at 10:29pm by Anonymous*

**physics**

starting from reast a boat increases its speed to 4.12 m/s with constant acceleration. (a) what is the boat's average speed? (b) If it take the boat 4.77s to reach this speed, how for has it traveled?
*Thursday, November 17, 2011 at 5:35pm by taylor*

**Math: Calculus - Vectors**

If the boat moves directly across then there is enough of the boats speed vector to counteract the river flow. That is 2m/s. So, the vector parallel to the shore (the river flow) speed is 2m/s. The TOTAL speed of the boat is 5m/s. Now solve this for the speed perpendicular to ...
*Tuesday, February 19, 2008 at 10:29pm by Quidditch*

**physics **

Starting from rest, a boat increases its speed to 4.92 m/s with constant acceleration. (a) What is the boat's average speed? (b) If it takes the boat 5.07 s to reach this speed, how far has it traveled?
*Wednesday, August 29, 2012 at 9:16pm by stoic-rider77*

**Physics**

A rock is dropped from a bridge that is 45 m above the water. It falls directly into a model boat, moving with constant velocity, that is 12 m from the point of impact when the key is released. What is the speed of the boat?
*Monday, April 22, 2013 at 8:55pm by shy*

**Physics**

A boat moving at 15 km/h relative to water is crossing a river 1.5 km wide. The river flows at 5.0 km/h a) if the boat heads directly for the opposite shore, how long will the trip take? b)Where will the boat arrive on the opposite shore? c)If the boat is to reach a point ...
*Monday, September 24, 2007 at 9:59pm by JohnX*

**physics**

A boat moving at 15 km/h relative to water is crossing a river 1.5 km wide. The river flows at 5.0 km/h a) if the boat heads directly for the opposite shore, how long will the trip take? b)Where will the boat arrive on the opposite shore? c)If the boat is to reach a point ...
*Monday, September 24, 2007 at 11:15pm by cindy*

**Math word problem**

The Mad River flows at a rate of 3 km/h. In order for a boat to travel 78.2 km upriver and then return in a total of 8 hr, how fast must the boat travel in still water? what formula would be used to solve this problem?
*Sunday, November 9, 2008 at 1:47pm by Shawn*

**Physics**

i didnt get the answer of bob very well. can he help me more widely. the question is Q)A boat moving at 15 km/h relative to water is crossing a river 1.5 km wide. The river flows at 5.0 km/h a) if the boat heads directly for the opposite shore, how long will the trip take? b)...
*Monday, September 24, 2007 at 9:59pm by johnX*

**geometry**

A rope is connected to a boat and to the boat's anchor that is resting on the ocean floor at a position not directly under the boat. The rope is 105 feet long and the water is 55 feet deep. To the nearest tenth of a foot, how far is the anchor from a point directly below the ...
*Thursday, October 2, 2008 at 10:06pm by kb*

**geometry**

A rope is connected to a boat and to the boat's anchor that is resting on the ocean floor at a position not directly under the boat. The rope is 105 feet long and the water is 55 feet deep. To the nearest tenth of a foot, how far is the anchor from a point directly below the ...
*Thursday, October 2, 2008 at 10:09pm by kb*

**math**

A boat travels 8km upstream and back in 2 hours. If the current flows at a constant speed of 3km/h, Find the speed of the boat in still water.(when the boat goes upstream, it speed reduces by 3km/h, and when going downstream, its speed increases by 3 km/h)
*Tuesday, January 15, 2013 at 5:48am by zshen*

** Advanced Maths (Vectors) AQA Level**

A boat which can travel at 5m/s in still water is crossing a river 200 m wide.the rate of the flow of the river is 2 m/s assumed uniform at every point in the river. Point A and B are directly opposite to each other across the river. a) If the boat leaves A and steer towards B...
*Tuesday, February 21, 2012 at 1:20pm by Jat*

**Advanced Maths (Vectors) AQA Level, please help?**

A boat which can travel at 5m/s in still water is crossing a river 200 m wide.the rate of the flow of the river is 2 m/s assumed uniform at every point in the river. Point A and B are directly opposite to each other across the river. a) If the boat leaves A and steer towards B...
*Sunday, February 12, 2012 at 2:45pm by jat*

**Physics**

Two boats are heading away from shore. Boat 1 heads due north at a speed of 3.7 m/s relative to the shore. Relative to boat 1, boat 2 is moving 35° north of east at a speed of 1.3 m/s. A passenger on boat 2 walks due east across the deck at a speed of 1.2 m/s relative to boat ...
*Monday, September 20, 2010 at 12:11am by Randal*

**Physics**

A boat can travel 2.85 m/s in still water. If the boat points its bow directly across stream whose current is .95 m/s, what is the velocity of the boat relative to the shore?
*Sunday, November 13, 2011 at 7:54pm by Anonymous*

**Physics**

A current of a river flows steadily from west to east at 1.00 m/s. A boat in the river travels at 3.00 m/s relative to the water. The river is 20.0 m wide with parallel banks. The boat leaves the shore at point A, and point B is directly across the river from that point. 1) At...
*Sunday, September 19, 2010 at 7:48pm by .*

**Calculus**

The first boat is sailing towards the North at the speed of 6 km per hour and sees that another boat is heading east at the speed of 5 km per hour. The second boat is to the northwest of the first boat. what is the minimum distance between two boats, assuming that they do not ...
*Tuesday, December 3, 2013 at 8:35pm by Jessica*

**phys**

A boat is traveling upstream at 14 mph with respect to a river that is flowing at 6 mph (with respect to the ground). A man runs directly across the boat, from one side to the other, at 6 mph (with respect to the boat). The speed of the man with respect to the ground is:
*Wednesday, February 19, 2014 at 12:57am by jai*

**Physics**

A power boat of mass 495 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 780 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume-contrary to fact-that the resistive force due to the water is constant, ...
*Monday, February 25, 2008 at 2:32pm by John*

**Physics**

A power boat of mass 460 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 765 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume-contrary to fact-that the resistive force due to the water is constant, ...
*Monday, February 25, 2008 at 3:50pm by Peter*

**physics**

A power boat of mass 465 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 765 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume-contrary to fact-that the resistive force due to the water is constant, ...
*Saturday, October 23, 2010 at 1:53pm by Xavier*

**physics**

A boat heads directly across a river 39 m wide at 3.9 m/s. The current is flowing downstream at 2.4 m/s. (a) What is the resultant velocity of the boat? m/s (magnitude) ° (direction) (b) How much time does it take the boat to cross the river? s (c) How far downstream is the ...
*Tuesday, October 4, 2011 at 9:29pm by Eddie*

**Physics**

Diane rows a boat at 8.3 m/s directly across a river that flows at 5.6 m/s. (a) What is the resultant speed of the boat? m/s (b) If the stream is 250 m wide, how long will it take Diane to row across? s (c) How far downstream will Diane be
*Tuesday, October 4, 2011 at 9:21pm by Eddie*

**calculus**

A man launches his boat from point A on a bank of a straight river, 3 km wide, and wants to reach point B, 2 km downstream on the opposite bank, as quickly as possible. He could row his boat directly across the river to point C and then run to B, or he could row directly to B...
*Friday, December 4, 2009 at 9:30pm by Avilene*

**Physics **

A boat crosses a river of width 113 m in which the current has a uniform speed of 0.933 m/s. The pilot maintains a bearing (i.e., the direction in which the boat points) perpendicular to the river and a throttle setting to give a constant speed of 2.58 m/s relative to the ...
*Monday, January 28, 2013 at 7:42am by Karen*

**physics**

A man is in a boat out away from shore. Th mass of the man, the boat and everything in it is 210 kg. The boat is not moving. The man throws and anchor with a mass of 26 kg straight out from the boat with a speed of 6.6 m/s. What is the resulting speed of the boat?
*Sunday, February 9, 2014 at 8:06pm by jim*

**physics**

A power boat of mass 460 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 765 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume -- contrary to fact -- that the resistive force due to the water is ...
*Friday, October 2, 2009 at 5:42pm by kp*

**Physics**

A power boat of mass 475 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 770 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume -- contrary to fact -- that the resistive force due to the water is ...
*Monday, February 26, 2007 at 1:19am by Mary*

**algebra-NOW PLEASE**

A boat is traveling in a river with a current that has a speed of 1.5 km/h. In one hour, the boat can travel twice the distance downstream as it can travel upstream. What is the boat's speed in still water?
*Tuesday, December 4, 2012 at 9:35pm by Alex*

**UPSTREAM**

THIS EXURSION WITH A BOAT TRAVEL 35KM UPSTREAM AND THEN BACK AGAIN IN 4 H 48 MINUTRE. iF THE SPEED OF THE BOAT I5 K,/H, WHAT IS THE SPEED OF THE CURRENT? Let v be the speed of the current. The boat's speed upstream (relative to the land) is 15-v and the speed downstream is 15+...
*Thursday, December 21, 2006 at 2:21am by CINDY*

**physics**

A boat crosses a river of width 98.4 m in which the current has a uniform speed of 1.84 m/s. The pilot maintains a bearing (i.e.,the direction in which the boat points) perpendicular to the river and a throttle settingto give a constant speed of 2.11 m/s relative to the water...
*Friday, February 14, 2014 at 12:17pm by Treal*

**phy**

A boat can travel 2.60 m/s in still water.If the boat points its prow directly across a stream whose current is 1.10 m/s, what is the velocity (magnitude and direction) of the boat relative to the shore? What will be the position of the boat, relative to its point of origin, ...
*Sunday, September 5, 2010 at 1:14pm by ami*

**calculus**

Boat A leaves the dock at 12pm heading due South at a constant speed of 20 km/h. Meanwhile, at 12pm Boat B, a pirate ship, is 15 km due West of the dock where boat A started, and is sailing due East at a constant speed of 15 km/h. If the pirates get within 10 km of another ...
*Wednesday, November 10, 2010 at 1:27am by Anya*

**Math**

How do you set this up? Solve the system using substitution: A boat travels 18 miles downstream in 1.5 hrs. It then takes the boat 3 hrs. to travel upstream the same distance. Find the speed of the boat in still water and the speed of the current. Thanks you!!!
*Thursday, December 6, 2012 at 8:22pm by Erin*

**physics**

The cable of a 1800-kg elevator has broken, and the elevator is moving downward at a steady speed of 1.6 m/s. A safety braking system that works on friction prevents the downward speed from increasing. a. speed of boat when leaves ramp (assume that engine turned off once boat ...
*Tuesday, May 1, 2012 at 8:20pm by lost*

**physics**

A boat crosses a river of width 120 m in which the current has a uniform speed of 2.04 m/s. The pilot maintains a bearing (i.e., the direc- tion in which the boat points) perpendicular to the river and a throttle setting to give a constant speed of 2.58 m/s relative to the wa...
*Sunday, September 15, 2013 at 5:53pm by Anonymous*

**Physics**

A boat crosses a river of width 122 m in which the current has a uniform speed of 2.39 m/s. The pilot maintains a bearing (i.e., the direction in which the boat points) perpendicular to the river and a throttle setting to give a constant speed of 2.81 m/s relative to the water...
*Thursday, November 8, 2012 at 8:57am by Greg Knightly*

**Physics**

A person can row a boat at a rate of 25 m/s in still water. The person heads the boat directly across a stream that flows at a rate of 9 m/s. Find the resultant velocity of the boat.
*Monday, January 11, 2010 at 8:48pm by Iman*

**Calculus**

A boat crosses a river and arrives at a point on the opposite bank directly across from its starting position. The boat travels at 4 m/s and the current is 2m/s. If the river is 600 m wide in what direction must the boat steer and how long will it take to cross?
*Tuesday, May 4, 2010 at 5:53pm by Abbie*

**physics**

. A 70-kg man and a 50-kg woman are in a 60-kg boat when its motor fails. The man dives into the water with a horizontal speed of 3m/s in order to swim ashore. If he changes his mind, can he swim back to the boat if his swimming speed is 1m/s? If not, can the woman change the ...
*Thursday, February 28, 2013 at 11:08am by jake*

**physics**

. A 70-kg man and a 50-kg woman are in a 60-kg boat when its motor fails. The man dives into the water with a horizontal speed of 3m/s in order to swim ashore. If he changes his mind, can he swim back to the boat if his swimming speed is 1m/s? If not, can the woman change the ...
*Thursday, February 28, 2013 at 11:08am by jake*

**physical**

A 70-kg man and a 50-kg woman are in a 60-kg boat when its motor fails. The man dives into the water with a horizontal speed of 3m/s in order to swim ashore. If he changes his mind, can he swim back to the boat if his swimming speed is 1m/s? If not, can the woman change the ...
*Saturday, March 2, 2013 at 3:28am by jake*

**Maths**

Where was Tom when Michael started rowing? He must have been farther upstream at the time. I will assume Tom was one km upstream when Michael started rowing. Let v = the river speed and V = 10v be Michael's speed in still water. Michael rows downstream at a land speed v + V = ...
*Tuesday, August 19, 2008 at 4:34am by drwls*

**physics**

Presumably the boat is aimed perpendicular to the parallel banks, but the current carries it downstream. Just for orientation, let's say the river flows east, and the boat crosses to the north. In that case, we can draw a diagram involving the relative velocities. The boat's ...
*Friday, October 7, 2011 at 5:44pm by Steve*

**physical science**

A 70-kg man and a 50-kg woman are in a 60-kg boat when its motor fails. The man dives into the water with a horizontal speed of 3m/s in order to swim ashore. If he changes his mind, can he swim back to the boat if his swimming speed is 1m/s? If not, can the woman change the ...
*Friday, September 21, 2012 at 5:46pm by maria*

**math **

a boat crosses a river and arrives at a point on the opposite bank directly across from its starting position. The boat traveks at 4m/s and the current is 2m/s. If the river is 600 m wide in what direction must the boat steer and how long will it take to cross?
*Wednesday, May 5, 2010 at 1:12am by Ann*

**Pre-Calculus-Trig**

A lighthouse keeper 100 feet above the water sees a boat sailing in a straight line directly toward her. As watches, the angle of depression to the boat changes from 25 degrees to 40. How far has the boat traveled during this time?
*Sunday, January 30, 2011 at 7:44pm by Chloe Mack*

**pre cal**

A boat has passed directly over a submarine as pictured below. The sub is running at a depth of 588 ft, and the angle of depression from the boat to the sub is 35 degrees. Find the distance, x, from the boat to the submarine.
*Tuesday, February 8, 2011 at 10:44pm by karina*

**CALC urgent please**

A boat crosses a river and arrives at a point on the opposite bank directly across from its starting position. The boat travels at 4 m/s and the current is 2m/s. If the river is 600 m wide in what direction must the boat steer and how long will it take to cross?
*Tuesday, May 4, 2010 at 11:04pm by Ariza*

**science**

A boat crossing a .2 mile wide river is heading perpendicularly relative to shore. Its speed in still water is 4mph and the speed of the current is 6mp. a.) How far downstream will the boat land? b.) How long will it take for the boat to cross i.) with the current? ii.) ...
*Wednesday, September 29, 2010 at 2:25pm by laura*

**Algebra 1**

A boat towing a water skier leaves a dock and travels east at a speed of 20mph. Two minutes later, a second boat towing another skier leaves the dock in the same direction at a speed of 25mph. How long will it take the second boat to overtake the first boat? PLEASE help!? /:
*Thursday, January 12, 2012 at 3:32pm by Kiersten Hailey*

**Classical mechanics**

A boat leaves point P on one side of a river bank and travels with constant velocity V in a direction towars point Q on the other side of the river directly oposite P and distance D from it If r is the instantaneous distance from Q to the boat, θ is the angle between r, ...
*Friday, February 7, 2014 at 4:42pm by JuanPro*

**Physics**

A man can row a boat at a speed of 4.40 km/h in still water. If he is crossing a river where the current is 2.45 km/h, in what direction should his boat be headed if he wants to reach a point directly opposite his starting point? I've tried 56.16 degrees and 29.1 degrees and ...
*Wednesday, February 2, 2011 at 4:46pm by Lindsey*

**Math**

A fishing boat leaves port at 11 miles per hour at a bearing of 210 degrees for 2 hours, then turns to a bearing of 250 degrees at 8 miles per hour for 4 hours, and finally changes to a bearing of 280 degrees at 7 miles per hour for 2 hours. At this point, the boat heads ...
*Wednesday, November 7, 2012 at 12:11pm by Shruti*

**Maths**

Suppose that a boat moves in a straight line with speed v through water with resistance proportional to the square of its speed v with initial speed v0 and initial position x0. Find its speed v(t) and position x(t) and conclude that the boat travels an infinite distance.
*Monday, March 25, 2013 at 4:05pm by James*

**Physics**

a boat crosses a 2 km wide river by starting out at the south shore and heading directly for the north shore if the river flows at 0.8 m/s and the boat can go at 1.4 m/s in still water, where on the opposite shore will the boat land?
*Saturday, March 9, 2013 at 1:41am by Eduardo*

**Physics**

a boat crosses a 2 km wide river by starting out at the south shore and heading directly for the north shore if the river flows at 0.8 m/s and the boat can go at 1.4 m/s in still water, where on the opposite shore will the boat land?
*Saturday, March 9, 2013 at 1:41am by Eduardo*

**physics**

A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials' boat pulls up next to the spy's boat, both reach the edge of a 7.7 m waterfall. If the spy's speed is 19 m/s and the officials' speed is 29 m/s, how far apart ...
*Tuesday, October 4, 2011 at 12:00am by faviola*

**Physics**

A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials' boat pulls up next to the spy's boat, both reach the edge of a 7.5 m waterfall. If the spy's speed is 19 m/s and the officials' speed is 24 m/s, how far apart ...
*Tuesday, October 11, 2011 at 8:11pm by Emily*

**physics**

A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials' boat pulls up next to the spy's boat, both reach the edge of a 4.2 m waterfall. If the spy's speed is 20 m/s and the officials' speed is 24 m/s, how far apart ...
*Thursday, December 13, 2012 at 8:10pm by Anonymous*

**physics**

A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials' boat pulls up next to the spy's boat, both reach the edge of a 4.2 m waterfall. If the spy's speed is 20 m/s and the officials' speed is 24 m/s, how far apart ...
*Tuesday, January 1, 2013 at 1:38pm by Anonymous*

**math**

A boat needs to travel south at a speed of 20 km/h. However a constant current of 6 km/h is flowing from the south-east. Use vectors to find: a.the equivalent speed in still water for the boat to achieve the actual speed of 20 km/h. b the direction in which the boat must head ...
*Friday, March 28, 2014 at 1:22am by Anonymous*

**physics **

A spy in a speed boat is being chased down a river by government officials in a faster craft. just as the officials' boat pulls up next to the spy's boat both boats reach the edge of a 5.0meter waterfall. If the spies speed is 15m/s and the officials' speed is 26 m/s, how far ...
*Saturday, November 6, 2010 at 8:15am by luke*

**Physics**

A boat must cross a 260-m-wide river and arrive at a point 110 upstream from where it starts. To do so, the pilot must head the boat at a 45 degree upstream angle. THe current has speed 2.3 m/s. a) What is the speed of the boat in still water? b) How much time does the journey...
*Tuesday, February 5, 2013 at 1:09am by Chris*

**physics**

A spy in a speed boat is being chased down a river by government oﬃcials in a faster craft. Just as the oﬃcials’ boat pulls up next to the spy’s boat, both boats reach the edge of a 5.3 m waterfall. The spy’s speed is 15 m/s and the oﬃcials’ speed is 24 m/s
*Tuesday, May 1, 2012 at 11:51pm by Anonymous*

**science**

A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials’ boat pulls up next to the spy’s boat, both boats reach the edge of a 5.3 m waterfall. The spy’s speed is 16 m/s and the officials’ speed is 26 m/s. How far ...
*Thursday, October 11, 2012 at 1:20pm by Anonymous*

**math**

A ferry boat operator is required to drive directly to the opposite side of the river (starting at south side of river is A and the north side of river is B where boat will end up) but does not know where to point the nose of the boat. The river is flowing due West at 4 mph ...
*Sunday, October 16, 2011 at 11:50pm by Brian*

**Science**

A 70kg person dives horizontally from a 200kg boat with a speed of 2 m/s. What is the recoil speed of the boat?
*Saturday, February 11, 2012 at 8:06pm by Jane*

**Physics**

A boat sets off perpendicular to the bank, to cross a river width of 250m. The speed of the boat in still water is 3.20ms-1, however there is a current downstream at 1.20ms-1, which puss the boat sideways. a) Find the resultant velocity of the boat. b) Find the total distance ...
*Saturday, March 9, 2013 at 10:04pm by Mariya*

**physcis**

Boat A negotiates a curve whose radius is 375 m. Boat B negotiates a curve whose radius is 150 m. Each boat experiences the same centripetal acceleration. What is the ratio of the speed of boat A to that of boat B?
*Sunday, February 19, 2012 at 2:04pm by KayLyn*

Pages: **1** | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>