Friday

October 21, 2016
Number of results: 14,769

**Physics**

A ball is dropped from rest from a height of 20.0m. One second later a second ball is thrown vertically downwards. If the two balls arrive on the ground at the same time, what must have been the initial velocity of the second ball?

*August 31, 2012 by Alex*

**Physics**

A ball is dropped from rest from a height of 20.0m. One second later a second ball is thrown vertically downwards. If the two balls arrive on the ground at the same time, what must have been the initial velocity of the second ball?

*August 31, 2012 by Alex*

**phys**

Suppose a newly found elementary particle has an average lifetime, T=30 ns, when at rest. In order for this new elementary particle to travel 15m in one lifetime, how fast must it be moving relative to the velocity of light? In other words, find v/c.

*October 12, 2006 by slien*

**PHYSICS**

4)SIMPSON DRIVES HIS CAR WITH AN AVERAGE VELOCITY OF 48.0KM/H TO THE EAST. HOW LONG WILL IT TAKE HIM TO DRIVE 144KM ON A STRAIGHT HIGHWAY? 5)LOOK BACK AT QUESTION 4 . HOW MUCH TIME WOULD SIMPSON SAVE BY INCREASING HIS AVERAGEVELOCITY TO 56.0KM/H TO THE EAST?

*September 5, 2007 by Susie*

**physics**

Reggie Jackson stepped up to the plate and hit a .15 kg fast ball traveling at 36m/s, the impact caused the ball to leave his bat with a velocity of 45 m/s in the opposite direction. If the impact lasted for .002 seconds, with what force did Jackson exert on the baseball?

*May 27, 2009 by chelsea*

**advanced functions**

The manufacturer of a propeller for a small aircraft mandates a maximum operating angular velocity of 300 rad/s. Determine whether it is safe to install this propeller on an aircraft whose engine is expected to run at a maximum of 2800 rpm.

*November 8, 2009 by -*

**physics**

player kicks football from ground level with velocity of32 m/s at an angle of 40 degrees above horizontal. What is hang time of football? How far does the ball travel horizontally before hitting the ground? What is the maximum height that the ball reaches?

*November 29, 2010 by chelsie*

**physics**

a yo-yo of mass 440kg measuring 0.9m in radius was dropped from a platform 63m high. One end of the string was tied to the platform, so the yo-yo unwinds as it descends. Assuming the axle of the yo-yo has a radius of 0.2m, find the velocity of descent at the end of the fall. ...

*December 29, 2010 by samantha*

**science**

. A parachutist jumps from a plane at 8000 ft altitude with a 24-ft diameter chute. Total weight of the jumper and the chute is 185 lbs. Determine the time to fall from 8000 ft to 5000 ft using the average fall velocity between the two elevations.

*February 12, 2011 by hassanian*

**Physics**

A helicopter is ascending (moving upwards) at a constant velocity of 8 m/s. At a height of 90m, a passenger opens a window and drops a package to the ground below. How long does it take the package to hit the ground and how fast is it moving just before impact?

*September 5, 2011 by Caylee*

**Physics**

A helicopter is ascending (moving upwards) at a constant velocity of 8 m/s. At a height of 90m, a passenger opens a window and drops a package to the ground below. How long does it take the package to hit the ground and how fast is it moving just before impact?

*September 5, 2011 by Caylee*

**Physics**

A helicopter is ascending (moving upwards) at a constant velocity of 8 m/s. At a height of 90m, a passenger opens a window and drops a package to the ground below. How long does it take the package to hit the ground and how fast is it moving just before impact?

*September 5, 2011 by Caylee*

**Physics**

A helicopter is ascending (moving upwards) at a constant velocity of 8 m/s. At a height of 90m, a passenger opens a window and drops a package to the ground below. How long does it take the package to hit the ground and how fast is it moving just before impact?

*September 5, 2011 by Caylee*

**Physics**

A helicopter is ascending (moving upwards) at a constant velocity of 8 m/s. At a height of 90m, a passenger opens a window and drops a package to the ground below. How long does it take the package to hit the ground and how fast is it moving just before impact?

*September 5, 2011 by Caylee*

**physics**

A helicopter is ascending (moving upwards) at a constant velocity of 8 m/s. At a height of 90m, a passenger opens a window and drops a package to the ground below. How long does it take the package to hit the ground and how fast is it moving just before impact?

*September 6, 2011 by Anonymous*

**physics**

A man stands on the roof of a 19.0 m tall building and throws a rock with a velocity of magnitude 30.0 m/s at an angle of 30.0 degrees above the horizontal. Ignore air resistance. Calculate the horizontal distance from the base of the building to the point where the rock ...

*September 14, 2011 by Meghan*

**physics**

While flying due east at 130 km/h, an airplane is also carried northward at 41 km/h by the wind blowing due north. What is the plane's resultant velocity? (Draw vector diagram to solve problem.) Magnitude km/hDirection (north of east) 72° 18° 18° 72°

*October 4, 2011 by Eddie*

**physics**

A horizontal force of 142 N is used to push a 47.0 kg packing crate a distance of 6.00 m on a rough horizontal surface. The acceleration of gravity is 9.81 m/s2 . If the crate moves with constant velocity, calculate a) the work done by the force. Answer in units of J b) the ...

*October 12, 2011 by #!*

**physics**

A horizontal force of 142 N is used to push a 47.0 kg packing crate a distance of 6.00 m on a rough horizontal surface. The acceleration of gravity is 9.81 m/s2 . If the crate moves with constant velocity, calculate a) the work done by the force. Answer in units of J b) the ...

*October 12, 2011 by #!*

**calculus**

For time, t, in hours, 0\le t\le1, a bug is crawling at a velocity, v, in meters/hour given by v = \frac{5}{1 + t}. Use \Delta t = 0.2 to estimate the distance that the bug crawls during this hour. Find an overestimate and an underestimate. Then average the two to get a new ...

*November 16, 2011 by Anonymous*

**Physics**

A student throws a baseball vertically upward, and 2.8s later catches it at the same level. Neglecting air resistance , calculate the following (a) the velocity at which the ball left the students hand (b) the height to which the ball climbed above the students hand

*March 12, 2012 by Melissa*

**physics**

An object was launched with a velocity of 20 ms−1 at an angle of 45° to the vertical. At the top of its trajectory the object broke into two equal pieces. One piece fell vertically downwards. Where would the other piece fall? (Take g = 10 ms−2) (

*March 15, 2012 by swapnali*

**physics**

An object was launched with a velocity of 20 ms−1 at an angle of 45° to the vertical. At the top of its trajectory the object broke into two equal pieces. One piece fell vertically downwards. Where would the other piece fall? (Take g = 10 ms−2)

*March 16, 2012 by swapnali*

**physics**

An object was launched with a velocity of 20 ms−1 at an angle of 45° to the vertical. At the top of its trajectory the object broke into two equal pieces. One piece fell vertically downwards. Where would the other piece fall? (Take g = 10 ms−2)

*March 20, 2012 by swapnali*

**physics**

A 1.75-kg wooden block rests on a table over a large hole as in the figure below. A 4.60-g bullet with an initial velocity vi is fired upward into the bottom of the block and remains in the block after the collision. The block and bullet rise to a maximum height of 24.0 cm.

*March 25, 2012 by jeezy*

**physics**

A cannon on a level plain is aimed 50 degrees above th e horizontal and a shell is fired with a muzzle velocity of 1200 ft/s toward a vertical cliff 3200 ft away. How far above the bottom does the shell strike the side wall of the cliff?

*September 4, 2012 by valerie*

**Physics**

Rain is falling steadily but there is no wind. You are in an automobile that moves on a straight, flat highway at a constant speed of 80 km/hr. You see from the drops on the side window that the rain is falling at an angle of 58° measured from vertical (relative to the car). ...

*September 21, 2012 by josephz*

**physics**

A 44.8- child is standing on the outer edge of a merry-go-round that has moment of inertia 981 and radius 2.40 . The entire system is initially rotating at 0.180 . Find the angular velocity if the child moves to a final position 1.10 from the center of the merry-go-round.

*September 30, 2012 by Anonymous*

**algebra**

a rock is thrown witha velocity of 20 meters per second from the top of a 24 meter high cliff and it misses the cliff on the way back down. when will the rock be 10 meters from the water below? round your answer to two decimal places

*March 12, 2013 by Anonymous*

**physics111**

a river flows due south with a speed of 2.0m/s. a man steers a motorboat across the river;his velosity is 4.2m/s due east.the river is 800m wide. (A) what is his velocity(magnitude and direction)relative to the earth? (B)how much time is required to cross the river?

*April 2, 2013 by yonela*

**physics**

A body moving with a uniform acceleration travels distance of 24m and 64m during the first two equal consecutive intervals of time,each of duration 4s.determine the initial velocity and acceleration of the moving body full solved problem

*June 29, 2013 by sukh*

**PHYSICS**

A velocity selector consists of electric and magnetic fields described by the expressions vector E = E k hat bold and vector B = B j hat bold, with B = 0.0140 T. Find the value of E such that a 670 -eV electron moving along the negative x axis is undeflected. kV/m

*October 28, 2013 by ANITA*

**physics**

A velocity selector consists of electric and magnetic fields described by the expressions vector E = E k hat bold and vector B = B j hat bold, with B = 0.0140 T. Find the value of E such that a 670 -eV electron moving along the negative x axis is undeflected.

*October 29, 2013 by Suhani*

**PHYSICS**

A velocity selector consists of electric and magnetic fields described by the expressions vector E = E k hat bold and vector B = B j hat bold, with B = 0.0140 T. Find the value of E such that a 670 -eV electron moving along the negative x axis is undeflected.

*October 29, 2013 by Edmound*

**PHYSICS**

A velocity selector consists of electric and magnetic fields described by the expressions vector E = E k hat bold and vector B = B j hat bold, with B = 0.0140 T. Find the value of E such that a 670 -eV electron moving along the negative x axis is undeflected.

*October 30, 2013 by help!!*

**PHYSICS**

A velocity selector consists of electric and magnetic fields described by the expressions vector E = E k hat bold and vector B = B j hat bold, with B = 0.0140 T. Find the value of E such that a 670 -eV electron moving along the negative x axis is undeflected

*November 1, 2013 by viper*

**PHYSICS**

A velocity selector consists of electric and magnetic fields described by the expressions vector E = E k hat bold and vector B = B j hat bold, with B = 0.0140 T. Find the value of E such that a 670 -eV electron moving along the negative x axis is undeflected.

*November 2, 2013 by bad at physics*

**Algebra **

a rock is thrown upward with a velocity of 20 meters per second from the top of a 40 meter high cliff, and it misses the cliff on the way back down. when will the rock be 7 meters from the water, below? round your answer to two decimal places

*January 26, 2014 by Anonymous*

**Algebra**

Two boys are throwing a baseball back and forth. The ball is 4 ft above the ground when it leaves one child’s hand with an upward velocity of 36 ft/s. If acceleration due to gravity is –16 ft/s2, how high above the ground is the ball 2 s after it is thrown? h(t)=at^2+vt+h0 <...

*July 8, 2014 by Junior*

**Physics Help Urgent **

A ball is thrown straight up into the air with a velocity of 12 m/s. Draw a motion diagram for the ball and then give as much quantities information as you can about the motion. I know you guys can draw anything on this platform. But can you lead me to answer by giving ...

*September 14, 2014 by Tanya *

**Physics**

A bird watcher meanders through the woods, walking 1.10 km due east, 0.624 km due south, and 1.09 km in a direction 18.2 ° north of west. The time required for this trip is 1.046 h. Determine the magnitudes of the bird watcher's (a) displacement and (b) average velocity.

*October 5, 2014 by Candice*

**Physics**

A 1.75-kg wooden block rests on a table over a large hole as in the figure below. A 5.20-g bullet with an initial velocity vi is fired upward into the bottom of the block and remains in the block after the collision. The block and bullet rise to a maximum height of 20.0 cm.

*November 30, 2014 by Ana*

**Physics**

A bird watcher meanders through the woods, walking 1.07 km due east, 0.533 km due south, and 4.62 km in a direction 50.1 ° north of west. The time required for this trip is 1.451 h. Determine the magnitudes of the bird watcher's (a) displacement and (b) average velocity.

*August 19, 2015 by Anonymous*

**Algebra**

A rock is thrown upward with a velocity of 15 meters per second from the top of a 49 meter high cliff, and it misses the cliff on the way back down. When will the rock be 3 meters from the water, below? Round your answer to two decimal places.

*August 29, 2015 by pam*

**Physics **

This is another question I had too and didn't understand as well. Vector Addition: Use the head to tail method to determine the resultant vector of the following velocity vectors. V1= 540m/s @66 degrees V2= 12m/s @182 degrees V3= 96m/s @312 degrees V4= 332m/s @261 degrees

*February 2, 2016 by Dina*

**Physics**

A bullet of mass 3.9 g was fired at a stationary ball of lead. The head on impact moved the 10 kg ball at a velocity of .3703 m/s. If energy losses due to heat and internal energy are ignored. What was the speed of the bullet? a)370 b)950 c)549 d)975

*February 13, 2016 by Joe*

**physics**

A 5.25-kg ball, moving to the right at a velocity of +2.10 m/s on a frictionless table, collides head-on with a stationary 7.60-kg ball. Find the final velocities of the balls if the collision meet the following conditions. (a) elastic 5.25-kg ball = Incorrect: Your answer is ...

*March 1, 2016 by Rhea *

**Algebra **

A rock is thrown upward with a velocity of 21 meters per second from the top of a 48 meter high cliff, and it misses the cliff on the way back down. When will the rock be 7 meters from the water, below? Round your answer to two decimal places.

*September 21, 2016 by Matthew*

**physics**

a father pulls his young daughter on a sled with a constant velocity on a level surface through a distance of 10-m, if the total mass of the sled a the girl is 35-kg and the coefficent of kinetic friction between the sled runners and the snow is 0.20, how much work does the ...

*January 26, 2008 by melissa*

**physics**

A student thrusts a 0,20T magnet with a cross sectional area of 2.0 cm^2 into a coil of 400 turns in 0,50s. The coil has a resistance of 30 ohms and it is connected in series with a moving coil meter having a resistantace of 170 ohms. What is the average velocity and the current?

*June 13, 2008 by Tri*

**physics**

A student thrusts a 0,20T magnet with a cross sectional area of 2.0 cm^2 into a coil of 400 turns in 0,50s. The coil has a resistance of 30 ohms and it is connected in series with a moving coil meter having a resistantace of 170 ohms. What is the average velocity and the current?

*June 13, 2008 by Tri*

**differential equation**

a four -pound weight stretches a spring 8 inches from its natural lenght . the weight is pulled downward an additional 6 inches and released with an initial upward velocity of 8 feet per second . find a formula for the position of the weight as a function of time,t.

*April 6, 2010 by Anonymous*

**physics**

A father pulls his young daughter on a sled with a constant velocity on a level surface through a distance of 10 m, as illustrated below. If the total mass of the sled and the girl is 35 kg and the coefficient of kinetic friction between the sled runners and the snow is 0.20, ...

*April 11, 2010 by Anonymous*

**physics**

A one tonne moon obiter is to approach the moon and orbit through 270 degrees at an altitude of 100km. During this period its rockets are to be turned off. What is the required velocity of the obiter at the entry point to prevent the vehicle from crashing into the moon?

*August 11, 2010 by sandhya*

**physics**

A loaded dogsled has a mass of 400kg and is being pulled across a horizontal, paced snow surface at a velocity of 4.0m/s (N). Suddenly, the harness separates from the sled. If the coefficient of kinetic friction for the sled on the snow is 0.0500, how far will the sled coast ...

*October 22, 2010 by Jane*

**physics**

A passenger riding on a train moving over a bridge with a velocity of 55m/s, drops a pen out of the window. the pen lands in the river below 2.4 seconds later. A. find how high the window was above the water. B. how far forward did the pen move?

*January 17, 2011 by Anonymous*

**physics**

A passenger riding on a train moving over a bridge with a velocity of 55m/s, drops a pen out of the window. the pen lands in the river below 2.4 seconds later. A. find how high the window was above the water. B. how far forward did the pen move?

*January 17, 2011 by Anonymous*

**physics**

¬Calculate the period of oscillation of a simple pendulum of length 1.8 m, with a bob of mass 2.2 kg. What assumption is made in this calculation? (g = 9.8 m s - 2) If the bob of this pendulum is pulled aside a horizontal distance of 20cm and released, what will be the values ...

*May 18, 2013 by Anonymous*

**physics**

Severe stresses can be produced in the joints by jogging on hard surfaces or with insufficiently padded shoes.If the downward velocity of the leg is 7.3m/s when the joggers foot hits the ground. If the leg stops in a distance of 1.1 cm. Calculate the force on the ankle joint. ...

*February 12, 2014 by Paul*

**Algebra**

The velocity of a ball thrown in the air is 72ft Per second. The height of the ball after t seconds Is represented by the equation H = 72ft t - 62t^2. Describe the dependent variable, the domain and range. Honestly I have to say I am lost 72 + 72ft - 256 = ? 72 + 184t =0

*October 12, 2014 by Sue*

**physics**

Jordan throws a golfball straight up from the top of a building 50 meters high. The initial speed of the golfball is 20 m/s and it just misses the edge of the roof when it eventually falls. Neglecting air resistance, find the velocity of the golfball just at the instant it ...

*October 12, 2014 by Ellie*

**English (SATIRE)**

How does this one show SATIRE??? i have an idea but im not 100% sure its right. WHY GOLF IS GREAT What is the best sport? It's one of the great debates in our country, one which you can hear argued at your local bastion of culture we commonly call the "sports bar." Some ...

*April 12, 2009 by Soraya HELP!!!*

**physics**

if ball is thrown upward with a initial velocity of 38.5 m/s and the maximum height of the ball is 74.1m. How long will it take the ball to reach it's maximum height

*September 25, 2012 by lana*

**physics**

Calculate the escape velocity on the surface ov moon .Given the radius of moon=1.7×10(raise to power 6)m and mass of moon =7.35×10(raise to power 22)kg

*November 7, 2014 by Brinder Singh*

**Physics**

A bullet of mass 10 g hits a target and penetrated 2 cm in to it if the average resistance offered by target is 100 N then the velocity with which the bullet hits the target is ?

*August 2, 2015 by Tamanna*

**Physics - KE**

In Figure 11-32 (which shows a ball at the top of an incline, at the bottom of the incline a loop begins with radius R and Q a point on the loop lined up with the center of the loop), a solid brass ball of mass m and radius r will roll without slipping along the loop-the-loop...

*March 27, 2007 by COFFEE*

**Calculus**

An air ambulance is travelling from Barrie to Toronto. Toronto is located 90 km [S5°E] of Barrie. If the wind is blowing from the South with a velocity of 62 km/h, and the plane’s air speed is 375 km/h, what direction must the pilot fly to make it to Toronto? What on earth do ...

*July 2, 2008 by Derek*

**physics**

Kym is in a boat traveling 3.8 m/s straight across a river 240 m wide. The river is flowing at 1.6 m/s. a) What is Kym’s resultant velocity? - b) How long does it take Kym to cross the river? - c) How far is Kym downstream when she reaches the other side? -

*November 11, 2009 by sarah*

**Calc**

A metal cable has radius r and is covered by insulation, so that the distance from the center of the cable to the exterior of the insulation is R. The velocity v of an electrical impulse in the cable is v = -C(r/R)^2*ln(r/R) where c is a positive constant. Find the following ...

*December 2, 2009 by Greg*

**Physics**

A CD has to rotate under the readout-laser with a constant linear velocity of 1.25 m/s. If the laser is at a position 3.2 cm from the center of the disk, what are the revolutions per minute (rpms) of the disk? ***Can someone please step me through the problem step by step?***

*September 19, 2010 by Kelly*

**physics**

A crate of mass 20 kg is pushed up a frictionless ramp by a person as shown in the figure below. Calculate the work done by the person in pushing the crate a distance of 15 m as measured along the ramp. Assume the crate moves at a constant velocity.

*November 21, 2010 by Warren*

**AP Physics**

A cylindrical container of radius 20 cm contains water of height of 3 m. Two meters down from the water level there is a hole of 0.5 cm in radius. Find the velocity and volume flow rate of water leaving the hole. Where does it strike the ground?

*November 29, 2010 by Charlie*

**physics3**

7)A bus leaves Dubai at 10 am heading towards Abu Dhabi. The bus is moving at an average velocity of 120 Km/h. At what time is the bus expected to arrive Abu Dhabi assuming that the two cities are 150 Km away?

*December 14, 2010 by faisal*

**Phyisics**

A 2kg hallow sphere of a radius 6cm starts from rest and rolls without slipping down a 10 degree incline. if the length of the incline is 50cm then the velocity of the center of mass of the hallow sphere at the bottom of the incline is?

*October 26, 2011 by JP *

**engineering science**

a boat can sail at 27 m.s in still water. the boat must cross a river that flows at 9 m.s towards the east . if the boat crosses the river by going up stream at an angle of 23 south, what will the size and angle of the resulting velocity be?

*February 9, 2012 by Zane*

**Physics**

In her physics lab, Stephanie rolls a 30 g marble down a ramp and off a table with a horizontal velocity of 2 m/s. The marble falls in a cup placed 0.4 m from the table’s edge. a. How long is the ball in the air? 0.2 s b. How high is the table? m

*February 27, 2012 by Sam*

**Physics**

a) While painting a 12 meter high roof you knock the paint brush off the edge, with no air resistance on the brush how long will it take to hit the ground? b) What would the velocity of the brush be before it hit the ground?

*May 31, 2012 by Anonymous*

**PHYSICS HELP**

A fibre is fixed at one end it is stretched over a pulley (2.0kg) is the mass. if the mass per unit length of the fibre is 82g/m, calculate the velocity of the wave on the stretched fibre. (please show working)

*June 15, 2012 by Lyoto Machida*

**General Chemistry I**

The tomato is dropped. What is the velocity, , of the tomato when it hits the ground? Assume 82.7 of the work done in Part A is transferred to kinetic energy, , by the time the tomato hits the ground. Express your answer numerically in meters per second.

*October 29, 2012 by Taylor*

**physics**

A key falls from a bridge that is 45 m above the water. The key falls straight down and lands in a model boat traveling at a constant velocity of 3.5 m/s. Calculate the distance the boat was from the point of impact when the key was released. Answer d= 10.6 m

*November 11, 2012 by H*

**science**

A boy standing on top a building with a height of 500m throws a ball vertically upwards. The balls take 40s to reach to the ground. Neglecting the height of the boy throwing the ball, determine the velocity of the ball.

*December 23, 2012 by Pankaj kumar suman*

**Physics**

In her physics lab, Jessica rolls a 20-g marble down a ramp and off the table with a horizontal velocity of 1.10 m/s. The marble falls in a cup placed 0.44 m from the table's edge. Find the table's height. Use g = 10. m/s2. Enter m as unit.

*January 22, 2013 by Robert*

**pre calc**

The front sprocket off a bicycle is 12 centimeters and the rear one is 5 centimeters. What is the linear velocity of the chain around the back sprocket? if the bicycle has tires that have a 38 centimeter diameter, how fast is the bicycle moving?

*March 12, 2013 by Sarah*

**pre calc**

The front sprocket off a bicycle is 12 centimeters and the rear one is 5 centimeters. What is the linear velocity of the chain around the back sprocket? if the bicycle has tires that have a 38 centimeter diameter, how fast is the bicycle moving?

*March 12, 2013 by Sarah*

**Physics**

A nurse pushes a cart by exerting a force on the handle at a downward angle 35 degrees below the horizontal. The loaded cart has a mass of 28.0 kg, and the force of friction is 60.0N. What force must the nurse exert to move at a constant velocity?

*October 31, 2013 by Patty*

**physics**

A 15 kg mass, tied to the end of a 0.5 m long steel wire, is whirled in a vertical circle. The cross- section of the wire is 0.02 cm2. When the mass is at the bottom of the circle, its angular velocity is 2 rev s i. Find the elongation of the wire at this point.

*January 2, 2014 by badar*

**physics**

crate weighing 6.90 x 10^3 N is pulled up a 46° incline by a force parallel to the plane. If the coefficient of kinetic friction between the crate and the surface of the plane is 0.750, what is the magnitude of the applied force required to move the crate at a constant velocity?

*September 17, 2014 by nica*

**Physics II**

A positively charged particle is moving with a velocity v in a large homogeneous magnetic field. (a) If the field is 4 mT, the mass of the particle is 33·10−9 kg, its initial speed 8.1 m/s, and its charge 6 μC, what is the magnitude of its acceleration? (in m/s^2) (...

*October 2, 2014 by Ashton*

**physics**

A 98.0 kg ice hockey player hits a 0.150 kg puck, giving the puck a velocity of 49.5 m/s. If both are initially at rest and if the ice is frictionless, how far does the player recoil in the time it takes the puck to reach the goal 13.5 m away?

*February 3, 2015 by alex*

**Physics**

A car starts from rest and accelerate uniformely at 4m/s^2 for 6 seconds. for the next 8 sec. the driver moves with constant velocity. After this the driver applies brakes and stops the car in 10 sec. What is the total distance travelled by the car?

*September 14, 2015 by Calvin*

**algebra 2 A**

Unit 5: Quadratic functions and equations. I need help with the Firework display portfolio?? Fireworks Display Portfolio ALGEBRA 2 A: QUADRATIC FUNCTIONS AND EQUATIONS Directions: You are part of a fireworks crew assembling a local fireworks display. There are two parts to the...

*October 28, 2015 by Cody*

**Physics**

A block and tackle with a velocity ratio of 5 is used to raise a mass of 25kg through a vertical distances of 40cm at a steady rate.if the effort is equal to 60N,determine.(a)The distance moved by the effort.(b)The workdone by the effort in lifting the load.(c)The loss in ...

*January 1, 2015 by Rose*

**Physics**

Two identical pucks are on an air table. Puck A has an initial velocity of 2.0m/s in the +x-direction. Puck B is at rest. Puck A collides elastically with Puck B and A moves off at 1.0m/s at an angle of 60 degrees above the x-axis. What is the speed and direction of puck B ...

*April 2, 2011 by Help!*

**Physics/Formulas**

Calculate the SI units of the constants A and B in each of the following equations. Assume that the distance x is in meters (m), the time t is in seconds (s), and the velocity v is in meters per second (m/s). a. x = A + B.t Meters = A + B * seconds b. x = ¼ A.t2 Meters = 0.25...

*August 21, 2013 by Paul*

**physics**

A projectile is fired from the origin (at y = 0 m) as shown in the diagram. The initial velocity components are V0x = 310 m/s and V0y = 26 m/s. The projectile reaches maximum height at point P, then it falls and strikes the ground at point Q, which is 20 m below the launch ...

*February 21, 2013 by Anonymous*

**Physics**

a ship is headed towards east at a thrust speed of 7.00 knots. A strong wind pressure causes the ship to deviate to the north at 1.00 knots. The sea current is flowing to the southwest at 4.00 knots. Determine the velocity of the ship relative to the earth's surface.

*September 8, 2016 by Julie*

**ENGLISH**

1. "Imagine a wolf moving through the northern woods. The movement, over a trail he has traversed many times before, is distinctive, unlike that of a cougar or a bear, yet he appears, if you are watching, sometimes catlike or bearlike. It is purposeful, deliberate movement. ...

*October 26, 2015 by Kaai97*

**Simple algebra/Physics problem**

A proton, moving with a velocity of vi, collides elastically with another proton that is initially at rest. Assuming that after the collision the speed of the initially moving proton is 2.90 times the speed of the proton initially at rest, find the following. (a) the speed of ...

*November 8, 2015 by PersonWhoNeedsHelp*

**physics**

there is no air resistance. using a cannonball launcher, how can i find how far the cannonball will go (horizontally) if launched at 30 degrees? heres what i know: -the vertical displacement is -.245m -the vertical acceleration is -9.81m/s^2 -at 0 degrees, the initial velocity...

*September 8, 2009 by jawn*

**calc-kinematics**

if a particle moves along a line so that at time t where t [0,pi] its position is given by s(t)=-4cost-t^2/2+10 what is the velocity of the particle when its acceleration is zero? so i found v(t) = 4sint-t a(t)=4cost-1 = 0 solved for t plugged it into v(t) and i got the wrong ...

*March 30, 2010 by James*