Friday

April 18, 2014

April 18, 2014

Number of results: 64,131

**physics**

A rock is tossed straight up with a velocity of 37.1 m/s. When it returns, it falls into a hole 18.8 m deep. What is the rock's velocity as it hits the bottom of the hole?
*Monday, October 6, 2008 at 10:27pm by Vishnu*

**Physics**

A rock is tossed straight up with a velocity of 32.1 m/s. When it returns, it falls into a hole 20.1 m deep. What is the rock's velocity as it hits the bottom of the hole?
*Monday, October 4, 2010 at 11:27am by Bala*

**Physics**

A rock is tossed straight up with a velocity of 33.9 m/s. When it returns, it falls into a hole 11.9 m deep. What is the rock's velocity as it hits the bottom of the hole?
*Monday, October 4, 2010 at 7:13pm by Em*

**Phyiscs**

A rock is tossed straight up with a velocity of 33.9 m/s. When it returns, it falls into a hole 11.9 m deep. What is the rock's velocity as it hits the bottom of the hole?
*Monday, October 4, 2010 at 8:24pm by Em*

**Physics**

A rock is tossed straight up with a velocity of 33.9 m/s. When it returns, it falls into a hole 11.9 m deep. What is the rock's velocity as it hits the bottom of the hole?
*Monday, October 4, 2010 at 11:26pm by Em*

**physics**

A rock is tossed straight up with a velocity of 34.0 m/s. When it returns, it falls into a hole 17.3 m deep. What is the rock's velocity as it hits the bottom of the hole? How long is the rock in the air, from the instant it is released until it hits the bottom of the hole?
*Friday, October 8, 2010 at 11:04pm by Andres*

**physics**

A rock is tossed straight up with a velocity of 37.1 m/s. When it returns, it falls into a hole 18.8 m deep. How long is the rock in the air, from the instant it is released until it hits the bottom of the hole?
*Tuesday, October 7, 2008 at 7:18pm by Deepa*

**physics**

A rock is tossed straight up with a speed of 29m/s. When it returns, it falls into a hole 13m deep. Solve for rock's velocity as it hits the bottom of the hole. &How long is the rock in the air, from the instant it is released until it hits the bottom of the hole?
*Tuesday, June 12, 2012 at 9:46am by Amanda*

**University Physics**

A rock is tossed straight up with an initial speed of 20 m/s. When it returns, it fall into a hole that is 8.0 m deep. What is the velocity of the rock (in m/s) when it hits the bottom of the hole? Use -9.80 m/s2 for the local acceleration due to gravity and assume no ...
*Monday, September 12, 2011 at 3:31am by Me*

**phisics**

a rock is tossed straight up with a speed of 30m/s. when it returns it falls into a hole 10m deep. what is the rocks velocity as it hits the bottom of the whole? how long would the rock in the air, form the instant it is released until it hits the bottom on the hole
*Thursday, August 30, 2012 at 11:47pm by nicolas*

**physics**

A rock is tossed straight up with a velocity of 37.1 m/s. When it returns, it falls into a hole 18.8 m deep. What is the rock's velocity as it hits the bottom of the hole? Responses The gain in kinetic energy equals the loss of potential energy. (1/2) M (V2^ - V1^2) = M g *(18...
*Wednesday, October 8, 2008 at 12:56am by Vishnu*

**Physics**

a rock is thrown straight up which of the following statemetns concerning the net force acting on the rock at teh top of the path is true? assume air resistance is negligible. a)it's equal to the weight of the rock b) it is instantanwously equal to zero c) it's direction ...
*Wednesday, November 14, 2007 at 3:15pm by Andrea*

**Calculus**

A blast blows a rock straight up at 150 ft/sec. The path of the rock is described by the s(t) = 150t-16t^2 where s is measured in feet and t in seconds. Find the velocity of the rock when it is 200 ft above the ground and when the rock hits the ground.
*Saturday, February 18, 2012 at 1:42pm by Desperate!!!!*

**physics**

Brad tosses a rock straight up at 38.4 m/s. What is the rock's velocity after 2.0 seconds?
*Friday, October 21, 2011 at 12:36am by Jinnie*

**physics**

The acceleration due to the moon's gravity at its surface is less than what it is here on the surface of the earth. The computed value of 1.6 m/s2 is consistent with what the Apollo Program astronauts observed during their explorations there. Imagine an astronaut holding a ...
*Wednesday, October 2, 2013 at 10:12pm by becca*

**Physics**

Using energy considerations and neglecting air resistance, calculate how far a rock will rise above its point of release if it is tossed straight up with an initial speed of 10m/sec. Using energy considerations and neglecting air resistance, calculate how far a rock will rise ...
*Saturday, January 29, 2011 at 10:13pm by Anonymous*

**Physics **

A rock is thrown into a railroad car standing on a level frictionless track. If the rock has a mass of ms = 1.100 kg and is tossed with a velocity v = 6.3 m/s, how far up will the car go (mc = 5.400 kg) before stopping? Please explain
*Saturday, January 4, 2014 at 4:18pm by Harriet*

**Physics**

A dynamite blast sends a piece of rock (shatter) straight upwards. After 2.31x10^0 s the piece of rock has a velocity of 1.56x10^1 m/s. Assuming there is no air resistance, what is the initial velocity of the rock, to two significant figures?
*Thursday, October 14, 2010 at 1:19am by peter*

**physical science**

A rock thrown straight up climbs for 4.24 s, then falls to the ground. Neglecting air resistance, with what velocity did the rock strike the ground?
*Thursday, January 30, 2014 at 2:12pm by Coya*

**Physical Science**

A rock thrown straight up climbs for 2.50 s,the falls to the ground. Neglecting the air resistance, with wat velocity did the rock strike the ground?
*Saturday, March 6, 2010 at 6:15pm by Julie*

**pre-cal **

aj uses a lingshot to launch a rock straight up from the a point of 6 ft. above ground level with an initial velocity of 170 ft per second. A) find an equation that models the height of the rock t seconds after it is launched. b) what is the maximum height of the rock and when...
*Wednesday, October 24, 2012 at 10:08am by jhon avendano*

**physics**

Frank stands at the base of a building. He throws a 0.12kg rock straight up at a speed of 28m/s so that it rises to a maximum height of 12m above the top of the building and then falls straight down on the roof of the building. a) What is the height of the building? b) What is...
*Sunday, April 18, 2010 at 5:28pm by bob*

**Physics Gr.11**

Frank stands at the base of a building. He throws a 0.12kg rock straight up at a speed of 28m/s so that it rises to a maximum height of 12m above the top of the building and then falls straight down on the roof of the building. a) What is the height of the building? b) What is...
*Sunday, April 18, 2010 at 7:17pm by NINI*

**physics**

A rock is tossed straight up with a velocity of 37.1 m/s. When it returns, it falls into a hole 18.8 m deep. What is the rock's velocity as it hits the bottom of the hole? Responses The gain in kinetic energy equals the loss of potential energy. (1/2) M (V2^ - V1^2) = M g *(18...
*Wednesday, October 8, 2008 at 8:14pm by Vishnu*

**Physics **

A rock thrown straight up with a velocity of 29 m/s from the edge of a building just misses the building as it comes down. The rock is moving at 44 m/s when it strikes the ground. How tall was the building? The acceleration of gravity is 9.8 m/s Answer in units of m
*Monday, September 3, 2012 at 9:47pm by Diane*

**AP Physics**

A rock thrown straight up with a velocity of 30 m/s from the edge of a building just misses the building as it comes down. The rock is moving at 47 m/s when it strikes the ground. How tall was the building? The accelera- tion of gravity is 9.8 m/s2 . Answer in units of m.
*Tuesday, August 24, 2010 at 5:59pm by Alex*

**Physics**

You shoot a rock with a wrist-rocket straight up, it takes 6 seconds for it to come back down (IGNORE THE HEIGHT YOU SHOT IT FROM.) How high did the rock go? what was the rock's speed initially going up (V1)? How fast is it traveling when it hits the ground on the way down?
*Friday, October 21, 2011 at 5:34pm by Dakota*

**math**

Your friend is standing below the window outside of our classroom and attempting to throw a rock past the window to get your attention. The rock is thrown straight up in the air and passes our window 0.40s after being released. It passes the same window on its way back down 1....
*Friday, February 21, 2014 at 2:22pm by gabriela*

**PHYSICS- Please Help :(**

A ball is thrown downwards at a velocity of 14m/s from a bridge. One second earlier a rock is dropped from the same bridge. a)When will the ball meet up with the rock. b)When will the ball meet up with the rock? c)What is the initial minimum speed by the ball in order to catch...
*Sunday, February 12, 2012 at 9:37pm by Coco*

**physics**

A catapult gives a rock a vertical velocity of 122m/s. a. Determine the time the rock is in the air. b. Determine the maximum height the rock would reach. c. As the rock leaves the catapult the rock also has a horizontal velocity of 34m/s. solve for the rocks range. d. Solve ...
*Monday, November 19, 2012 at 9:01pm by Sadie*

**Physics **

An astronaut on a distant planet wants to determine its acceleration due to gravity. The astronaut throws a rock straight up with a velocity of + 14.2 m/s and measures a time of 22.2 s before the rock returns to his hand. What is the acceleration (magnitude and direction) due ...
*Thursday, September 6, 2012 at 9:19pm by Meghan*

**Calc**

If a rock is thrown upward on the planet Mars with a velocity of 17 m/s, its height (in meters) after t seconds is given by H = 17t − 1.86t^2. (a) Find the velocity of the rock after one second. (b) Find the velocity of the rock when t = a. (c) When will the rock hit the...
*Monday, October 17, 2011 at 4:38pm by Katrina*

**Physics**

You are going to toss a rock straight up into the air by placing it on the palm of your hand(you are not gripping it) then pushing your hand up very rapidly. Draw a free body a diagram for the rock for each situation, and write the sum of equation based on the free body ...
*Monday, February 17, 2014 at 3:40pm by George*

**physics**

One side of the roof of a building slopes up at 30.5°. A roofer kicks a round, flat rock that has been thrown onto the roof by a neighborhood child. The rock slides straight up the incline with an initial speed of 15.0 m/s. The coefficient of kinetic friction between the rock ...
*Monday, September 16, 2013 at 2:46pm by Anonymous*

**physics**

One side of the roof of a building slopes up at 30.5°. A roofer kicks a round, flat rock that has been thrown onto the roof by a neighborhood child. The rock slides straight up the incline with an initial speed of 15.0 m/s. The coefficient of kinetic friction between the rock ...
*Monday, September 16, 2013 at 2:51pm by Anonymous*

**physics**

One side of the roof of a building slopes up at 30.5°. A roofer kicks a round, flat rock that has been thrown onto the roof by a neighborhood child. The rock slides straight up the incline with an initial speed of 15.0 m/s. The coefficient of kinetic friction between the rock ...
*Monday, September 16, 2013 at 2:52pm by Anonymous*

**Physical Science**

Four balls are taken to the top of a building. Ball 1 is dropped (zero initial velocity). Ball 2 is thrown straight up with a velocity of 3 m/s. Ball 3 is thrown straight out with a horizontal velocity of 3 m/s. Ball 4 is thrown straight down with a velocity of 3 m/s. Which ...
*Sunday, April 28, 2013 at 1:36pm by ayana*

**physics**

An astronaut on a distant planet wants to determine its acceleration due to gravity. The astronaut throws a rock straight up with a velocity of 13.5 m/s and measures a time of 21.8 s before the rock returns to his hand. What is the acceleration due to gravity on this planet? (...
*Sunday, January 15, 2012 at 4:58pm by Jen*

**physics**

An astronaut on a distant planet wants to determine its acceleration due to gravity. The astronaut throws a rock straight up with a velocity of + 15.5 m/s and measures a time of 13.9 s before the rock returns to his hand. What is the acceleration (magnitude and direction) due...
*Monday, June 17, 2013 at 12:22pm by louis aaaa*

**physics**

Can an object's velocity change direction when its acceleration is constant? a) No this is not possible because it is always speeding up b) No this is not possible because it is always speeding up or always slowing down, but it can never turn around c) Yes it is possible and ...
*Monday, October 15, 2007 at 4:39pm by Tammy*

**Calculus**

The acceleration due to gravity near the surface of Mars is 3.72ms^-2 . A rock is thrown straight up from the surface with an initial velocity of 23ms^-2 . How high does it go?
*Monday, May 13, 2013 at 6:57am by Grant*

**Physics**

A man throws a rock of mass m = 0.310 kg straight up into the air. In this process, his arm does a total amount of work Wnet = 105 J on the rock. Calculate the maximum distance, h, above the man's throwing hand that the rock will travel. Neglect air resistance.
*Sunday, May 27, 2012 at 9:05pm by James*

**math **

a rock is thrown straight up in the air from an initial height of ho, in metres, with the initial velocity vo, in metres per second. The height in metres above the ground after t seconds is given by h(t) = -4.9t^2 + vo + ho. Find an expression for the time it takes the rock to...
*Friday, November 29, 2013 at 7:48pm by Kp*

**physics**

An astronaut on a distant planet wants to determine its acceleration due to gravity. The astronaut throws a rock straight up with a velocity of +13 m/s and measures a time of 20.5 s before the rock returns to his hand. What is the acceleration (magnitude and direction) due to ...
*Sunday, July 4, 2010 at 2:23pm by Dave*

**Calculus**

a grapefruit is tossed straight up with an initial velocity of 50 ft/sec. the grapefruit is 5ft above ground when released. how high does it go before returning to the ground equation? Equation of height in terms of time y= -16t^2+50t+5
*Friday, March 8, 2013 at 2:52am by Alc*

**physics**

One day I decide I want to see how high I can throw a rock. I throw a rock straight up in the air and it has a speed of 30 m/s when it leaves my hand. I then realize this was foolish, as I need to get out of the way before the rock comes back down and hits me on the head. How ...
*Friday, May 17, 2013 at 6:40am by HELP!!*

**Physics**

I threw a rock straight up with a speed of 20 m/s. I happened to be standing over a well when I threw it, so when instead of landing on the ground, it falls into the well. The surface of the water in the well is 5 meters below point when the rock left my hand. How long is it ...
*Friday, February 14, 2014 at 10:04am by Joy*

**Physics**

A rock is thrown vertically from the edge of a cliff that is 500 ft high. It takes 6.5 seconds for the rock to hit the ground at the base of the cliff. Assume air resistance is negligible. (a) What was the initial velocity (magnitude and direction) of the rock? (b) What was ...
*Friday, September 21, 2012 at 12:27am by josephz*

**Math**

Jim Handy finds an irregularly shaped five-sided rock. He labels each side and toss the rock 100 times. The results of his tosses are shown in the table. Determine the empirical probability that rock will land on side 4 if tossed again. Side 1 2 3 4 5 Frequency 32 18 15 13 22
*Tuesday, January 8, 2013 at 8:02pm by Arleen*

**ALGEBRA**

The velocity v (in feet per second) of a rock dropped into a well is related to time (in seconds) by the formula v = 32t. What is the velocity of the rock at the indicated instant? Write your answer in the form (t, v). (a) when the rock is released ( , ) (b) after 9 seconds
*Wednesday, April 25, 2012 at 8:32pm by Randy*

**Ýndustrial Engineering**

The figure shows the paths of a golf ball your friend drops from the window of her apartment and of the rock you throw from the ground at the same instant. The rock and the ball collide at x = 41.00 m, y = 17.02 m, and t = 2.94 s. If the ball was dropped from a height of h = ...
*Monday, March 18, 2013 at 12:08pm by Ozgun*

**physics**

The vertical component of velocity when the rock is thrown is 30 sin 42 = 20.07 m/s Calculate the time T that it takes the rock to hit the ground using that initial velocity. Hint: 20.07 T - (g/2) T^2 + 19.0 = 0 I assume you know what g is, and how to solve that quadratic ...
*Monday, September 14, 2009 at 11:06pm by drwls*

**physics**

You and two friends are on top of the library 30 m above the ground. At the same time that you drop a ball, from rest, one of your friends tosses a ball straight up, giving it an initial velocity of 15 m/s, and your other friend tosses a ball straight down, giving it an ...
*Monday, September 27, 2010 at 10:40pm by Sam*

**physics - Incomplete**

Is the ball thrown or dropped from the window? If thrown, at what velocity and angle? Is the rock thrown straight up, or at an angle, from some x-position?
*Tuesday, February 28, 2012 at 5:14am by Steve*

**Physics**

An attacker at the base of a castle wall 3.82 m high throws a rock straight up with speed 7.10 m/s from a height of 1.45 m above the ground. (a) Will the rock reach the top of the wall? __yes __no (b) If so, what is its speed at the top? If not, what initial speed must it have...
*Saturday, September 8, 2012 at 5:44pm by Emily*

**physics **

Julie throws a rock vertically upward. From a height of 64.0 meters above thehow ground. The initial velocity of the rock is 31.0 meters per second neglect air resistance How long does it take for the rock to hit the ground? What is the velocity of the rock just before it hit ...
*Monday, April 1, 2013 at 4:06pm by kieshà*

**Physics**

A rock is dropped of the side of a bridge and hits the water below 4s later. a. What was the rock’s velocity when it hit the water? b. What was the rock’s average velocity as it fell? c. What is the height of the bridge above the water?
*Tuesday, April 6, 2010 at 12:19am by Jackie*

**Physics**

A coin is tossed into the air with an initial speed of 8.00 m/s. In the absence of air resistance, how high does the coin go above its point of release It rises a distance h such that the potential energy gain (m g h) equals the initial kinetic energy loss ((1/2) m v^2 ). ...
*Thursday, January 4, 2007 at 10:34pm by Anonymous*

**physics**

A students on a balcony uses a slingshot to shoots rock straight up at 29.4 m/s. If the rock takes 8.0 s seconds to hit the ground below the balcony, how high is the balcony above the ground?
*Thursday, January 20, 2011 at 10:24pm by Anonymous*

**Science**

A sandy beach is essentially where pulverized, weathered rock along with some fragments of shelled creatures and other biota have collected, tossed up by the waves and as sediment from inland areas.
*Wednesday, December 4, 2013 at 4:03pm by Caitlyn*

**Physics**

You toss a ball up at 7.3m/s leaving your hand at 1.5 m above the floor. What is the balls velocity just before it hits the floor. Is the answer 2.7 m/s Suppose a second ball is tossed straight down at 7.3 m/s (from the same place 1.5 m above the floor). What would its ...
*Wednesday, January 14, 2009 at 1:41pm by Chloe*

**physics**

a rock was thrown at the height of 50.0 m above the ground with an initial velocity of 20.0 m/s straight upward.
*Tuesday, October 4, 2011 at 7:13pm by hd*

**physics**

the mathematical relationship between velocity (v) and time (t) for a coin tossed up into the air after it leaves the thrower¡¦s hand at t = 0 with a velocity of +15.0 m/s. Assume that the positive direction is upward and the acceleration of the coin is ƒ{9.8 m/s2.
*Friday, October 15, 2010 at 10:44am by abe *

**physics**

A man fires a rock of a slingshot directly upward.The rock has an initial velocity of 15m/s.How long will it take for the rock to return to the level he fired it at?
*Thursday, April 4, 2013 at 4:06am by Shazz*

**Phyiscs**

Suppose you throw a stone straight up with an initial velocity of 27.0 m/s and, 5.5 s later you throw a second stone straight up with the same initial velocity. The first stone going down will meet the second stone going up. At what height above the point of release do the two...
*Wednesday, December 5, 2012 at 2:10pm by HENRY!*

**Calculus Help Please!!! Check **

If a rock is propelled upward from the surface of Mars at a velocity of 93 m/sec, it reaches a height s = 93t – 1.86t^2 after t sec. a. Find the rock’s velocity and acceleration at time t. v'(t)=93-3.72t a''(t)=-3.73 b. How long does it take the rock to reach its highest point...
*Tuesday, April 8, 2014 at 2:21pm by Tenshi*

**physics**

A rock is dropped from a treetop 19.6 m high, and then, 1.00 s later, a second rock is thrown down. With what initial velocity must the second rock be thrown if it is to reach the ground at the same time as the first? I'm not sure how to find the initial velocity of the thrown...
*Sunday, February 10, 2013 at 7:00pm by Wes*

**Physics**

Bryan tosses a 75.0 g rock into the lake. The rock leaves hus hand at a height of 175 cm above the ground travelling at 19.0 m/s. How high above the ground will the rock travel if it is accidentally thrown straight up? How high above the water will it travel if it is thrown in...
*Thursday, January 16, 2014 at 8:56pm by Holly*

**Calculus**

well i have this homework question that says: A rock is dropped from the top of a 300-ft cliff. It's velocity at time t seconds is v(t0= -32 t feet per second. a.) Find the height of the rock above the ground at time t. b.) How long will the rock take to reach the ground? c.) ...
*Monday, May 11, 2009 at 10:01pm by Caitlin*

**physics**

the verical velocity component at 30 degrees is 1/2 the vertical component if straight up (after all, what is the sine 30 degrees?) so if vertical velocity is doubled, then energy is quadrupled, so potential energy at the top is four times, so height must be 4x, or 200m. Of ...
*Tuesday, October 1, 2013 at 3:28pm by bobpursley*

**physics**

a man stands on the roof of a building that is 30m tall and throws a rock with a velocity of magnitude of 40m/s at an angle of 33 degress a bove the horizontal. Calculate the following: a.) The maximum height above the roof reached by the rock. b.) The magnitude of the ...
*Thursday, February 7, 2013 at 6:51am by jm*

**physics**

Write down the mathematical relationship between velocity (v) and time (t) for a coin tossed up into the air after it leaves the thrower¡¦s hand at t = 0 with a velocity of +15.0 m/s. Assume that the positive direction is upward and the acceleration of the coin is ƒ{9.8 m/s2.
*Friday, October 15, 2010 at 10:44am by abe *

**physics**

A person throws a rock straight up into the air. At the moment it leaves the person's hand it is going 88 mph. When the rock reaches its peak, how fast is it going and what is the magnitude and direction of its acceleration? Ignore air drag.
*Tuesday, January 25, 2011 at 8:39pm by corbin*

**Physics**

A person throws a rock straight up into the air. At the moment it leaves the person's hand it is going 76 mph. When the rock reaches its peak, how fast is it going and what is the magnitude and direction of its acceleration? Ignore air drag.
*Wednesday, August 22, 2012 at 4:29pm by Kathy*

**physics**

A person throws a rock straight up into the air. At the moment it leaves the person's hand it is going 91 mph. When the rock reaches its peak, how fast is it going and what is the magnitude and direction of its acceleration? Ignore air drag
*Sunday, August 26, 2012 at 3:20pm by ginny*

**Calculus**

well i have this homework question that says: A rock is dropped from the top of a 300-ft cliff. It's velocity at time t seconds is v(t0= -32 t feet per second. a.) Find the height of the rock above the ground at time t. b.) How long will the rock take to reach the ground? c.) ...
*Sunday, May 10, 2009 at 10:55pm by Caitlin*

**algebra**

in the past professional baseball was played at the astrodome in Houston, Texas. the astrodome has a maximum height of 63.4 m. the height of a baseball t seconds after it is hit straight up in the air with a velocity of 45 ft/s is given by h = -9.8t + 45t + 1. will a baseball ...
*Thursday, April 11, 2013 at 3:52pm by anon*

**College Physics**

Consider a rock thrown off a bridge of height 78.5 m at an angle è = 25° with respect to the horizontal as shown in Figure P4.20. The initial speed of the rock is 15.6 m/s. Find the following quantities: (a) the maximum height reached by the rock (b) the time it takes the rock...
*Monday, September 12, 2011 at 1:49am by HELP*

**Physics**

A ball is tossed straight up into the air with an initial velocity of +15 m/s and at a height (from where it leaves the thrower's hand) of 2.0 m off the ground. Once the ball leaves the thrower's hand, it accelerates at -9.8m/s/s. a) How much does it take for the ball to hit ...
*Monday, September 27, 2010 at 12:46pm by Sam*

**chemistry**

Limestone fizzes when an acid is added. Dilute acids can break up this rock in the open. what is the name of of the process of breaking up a rock using a chemical like this acid? name another rock, which could be broken up by the same process.
*Friday, February 22, 2008 at 2:58pm by tash*

**physics**

Consider a rock that is thrown off a bridge of height 27 m at an angle θ = 24° with respect to the horizontal as shown in the figure above. If the initial speed the rock is thrown is 12 m/s, find the following quantities: (a) The time it takes the rock to reach its ...
*Monday, September 6, 2010 at 10:13pm by frank*

**Physics **

You are standing at the top of a deep, vertical cave and want to determine the depth of the cave. Unfortunately, all you have is a rock and a stopwatch. You drop the rock into the cave and measure the time that passes until you hear the rock hitting the floor of the cave far ...
*Sunday, September 30, 2012 at 10:51pm by Arya *

**Physics**

acceleration due to gravity questions A rock is dropped from a height of 7meters a) what is the average velocity of the rock during its fall b) how long does it take the rock to fall
*Thursday, February 25, 2010 at 12:14am by jake*

**physics**

A rock, mass = 2.0 kg, is fired straight up at 60 m/s from a catapult. What will be its maximum height at the moment it stops going up and starts to come down? Use the magnitude of g to be -10m/s2.
*Saturday, March 23, 2013 at 10:02pm by Anonymous*

**physics**

A person throws a rock straight up into the air. At the moment it leaves the person's hand it is going 81 mph. When the rock reaches its peak, how fast is it going and what is the magnitude and direction of its acceleration? Ignore air drag. Express your answer using ...
*Wednesday, September 4, 2013 at 12:56pm by Anonymous*

**Physics**

A slingshot is pulled back 55cm down to the ground with a rock in its pouch. The slingshot has a spring constant of 862N/m. The mass of the rock is 700g. What height is the rock when its velocity is 12m/s?
*Sunday, December 2, 2012 at 12:37pm by Snoop*

**Math**

A fair die is tossed and the number facing up is noted. If the probability of getting at least one ‘six’ is to exceed 0.9, how many times should the die be tossed.
*Thursday, May 10, 2012 at 3:23am by Koia*

**statistics**

A fair die is tossed and the number facing up is noted. If the probability of getting at least one ‘six’ is to exceed 0.9, how many times should the die be tossed.
*Friday, May 11, 2012 at 12:50am by Nesa*

**physics**

A rock is thrown from the roof of a building with a velocity v at an angle of alpha from the horizontal. The building has height h. You can ignore air resistance. Calculate the magnitude of the velocity of the rock just before it strikes the ground
*Friday, September 10, 2010 at 8:53pm by ami*

**Physics 1**

A rock is thrown straight upward with an initial velocity of 9.6 m/s in a location where the acceleration due to gravity has a magnitude of 9.81 m/s2. To what height does it rise? Help meh please.
*Wednesday, September 29, 2010 at 5:53am by Aisumi*

** Algebra**

Height difference. A red ball and a green ball are simultaneously tossed into the air. The red ball is given an initial velocity of 96 feet per second, and its height t seconds after it is tossed is -16t2 + 96t feet. The green ball is given an initial velocity of 80 feet per ...
*Friday, February 27, 2009 at 3:35pm by Debbie*

**algebra**

Height difference. A red ball and a green ball are simultaneously tossed into the air. The red ball is given an initial velocity of 96 feet per second, and its height t seconds after it is tossed is 16t2 96t feet. The green ball is given an initial velocity of 80 feet per ...
*Friday, July 23, 2010 at 11:19pm by joyce*

**phys**

A rock stuck in the tread of a 56.0--diameter bicycle wheel has a tangential speed of 3.10 . When the brakes are applied, the rock's tangential deceleration is 1.30m/s2 What is the magnitudes of the rock's angular velocity at = 1.70 ?
*Monday, May 28, 2012 at 11:17pm by keren*

**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/sat an angle of 42.0 degrees above the horizontal. You can ignore air resistance. Calculate the maximum height above the roof reached by the rock. Calculate the magnitude ...
*Monday, September 14, 2009 at 11:06pm by lina*

**phy**

is that true or false A rock is thrown straight up into the air At the peak its acceleration was zero
*Friday, September 17, 2010 at 8:29pm by ami*

**Physics**

A rock is thrown vertically upward with a speed of 11.0 from the roof of a building that is 70.0 above the ground. Assume free fall. In how many seconds after being thrown does the rock strike the ground? What is the speed of the rock just before it strikes the ground? The ...
*Sunday, September 10, 2006 at 2:13pm by JC*

**Physics**

Two rocks are thrown off the edge of a cliff that is 15.0 m above the ground. The first rock is thrown upward, at a velocity of +12.0 m/s. The second is thrown downward, at a velocity of −12.0 m/s. Ignore air resistance. Determine (a) how long it takes the first rock to ...
*Sunday, September 12, 2010 at 8:51pm by Sandy*

**Earth Science**

1. In the classroom during a visual inspection of a rock, a student recorded four statements about the rock. Which statement about the rock is an observation? (1)The rock formed deep in Earthâ€™s interior. (2)The rock cooled very rapidly. (3)The rock dates from the Cambrian ...
*Wednesday, June 18, 2008 at 12:54pm by Anonymous*

**physics**

How high will a 1.85 kg rock go if thrown straight up by someone who expends 80.0 J of energy on it?
*Saturday, September 29, 2012 at 5:14pm by tracy*

**Physics**

A rock is thrown straight upward with an initial velocity of 9.6 m/s in a location where the acceleration due to gravity ahs a magnitude of 9.81 m/s^2. To what height does it rise? please walk me through this problem:)
*Saturday, February 7, 2009 at 1:57pm by y912f*

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