Friday

October 28, 2016
Number of results: 13,294

**Physics **

The problem statement, all variables and given/known data A body is thrown upward and remains in air for 10 seconds , the initial velocity at which it was thrown in is? The attempt at a solution g = -10 , t = 10 s , vf = 0 , vi = ? Vf = vi + gt 0=vi + (-10) (10) Vi = 100 but ...

*July 12, 2015 by Shahab Mirza*

**Physics**

Could someone try to help me solve those 3 questions by giving me clues or equations? With what speed (SI Units) must a ball be thrown directly upward so that it remains in the air for 12.5 second? An object of mass 197kg is at rest. If a force of 2.5N is applied for 30 ...

*January 27, 2010 by cool*

**Physics**

A tennis ball with a speed of 5.0 m/s is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 3.0 m/s. If the ball is in contact with the wall for 0.013 s, what is the average acceleration of the ball while it ...

*August 29, 2012 by Ashley*

**Physics - URGENT**

A ball is thrown horizontally of a cliff. If the initial speed of the ball is 17 m/s and the cliff is 77 m high, how far from the base of the cliff will the ball land in the water below? Calculate the answer in meters (m) and rounded to three significant figures.

*September 16, 2015 by Anonymous*

**Physics**

A 0.500 kg object is thrown vertically upward with an average applied force of 8.20 N by a student. The force is applied through a displacement of 1.50m. a. What is the average net force acting on the object? b. What is the velocity of the object when it leaves the student's ...

*January 13, 2016 by Jeff*

**math**

A ball is thrown into the air with an upward velocity of 20 ft/s. Its height (h) in feet after t seconds is given by the function h(t) = –16t^2 + 20t + 2. How long does it take the ball to reach its maximum height? What is the ball’s maximum height? Round to the nearest ...

*March 28, 2014 by Nisabel*

**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**

1.) A ball is thrown straight upwards at a speed of 32.5 m/s and from a height of 1 m above the ground. How long before it hits the ground? 2.) An astronaut jumps on the moon with an initial upward velocity of 4.35m/s. If the acceleration of gravity on the moon is -1.62m/s^2, ...

*October 20, 2014 by Patti*

**PHYSICS**

A person on an apartment balcony holds a ball over the balcony and throws it directly upwards with an initial velocity of 30 m/s [up]. The ball was thrown from 15 m above the ground. How long will it take for the ball to hit the ground?

*February 19, 2013 by Tasha*

**Physics**

A 0.400-kg ball is dropped from rest at a point 1.80 m above the floor. The ball rebounds straight upward to a height of 0.730 m. What are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor?

*October 14, 2010 by Sarah*

**physics**

A 0.580-kg ball is dropped from rest at a point 1.60 m above the floor. The ball rebounds straight upward to a height of 0.650 m. What are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor?

*January 12, 2015 by Anonymous*

**physics**

a football is thrown to a moving receiver .the football leaves the quarterback's hands 1.75m above the ground with a velocity of 17.0m/s[25deg]if the receiver starts 12.0m away from the quarterback along the line of flight of the ball when is is thrown , what constant velocity...

*July 7, 2013 by jake*

**physics**

a football is thrown to a moving receiver .the football leaves the quarterback's hands 1.75m above the ground with a velocity of 17.0m/s[25deg]if the receiver starts 12.0m away from the quarterback along the line of flight of the ball when is is thrown , what constant velocity...

*July 7, 2013 by jake*

**physics**

Three identical balls are thrown from a cliff of height, h, above a horizontal plane. One ball is thrown at an angle of 45 degrees above the horizon, the second is thrown horizontally, and the third is thrown at an angle of 30 degrees below the horizon (so, part of this ...

*December 2, 2009 by William*

**physics**

Three identical balls are thrown from a cliff of height, h, above a horizontal plane. One ball is thrown at an angle of 45 degrees above the horizon, the second is thrown horizontally, and the third is thrown at an angle of 30 degrees below the horizon (so, part of this ...

*December 11, 2009 by Kelly*

**Science**

A ball thrown from the edge of a 35m high cliff takes 3.5s to reach the ground below. What was the ball's initial velocity?

*September 7, 2009 by Nick*

**Physics**

A ball is thrown horizontally at 10.0 m/s from the top of a hill50.0 m high. How far from the base of the cliff would the ball hit the ground?

*August 31, 2010 by Anonymous*

**Physics**

A ball is thrown straight up in the air at an initial speed of 30 m/s. Using conservation of energy, find the maximum height of the ball.

*November 20, 2012 by Joey*

**PHYSICS**

A tennis ball is thrown horizontally from an elevation of 20.60 m above the ground with a speed of 21.0 m/s vertical m from ground??? f the ball is still in the air, how long before it hits the ground? (If the ball is not in the air, enter 0.)???? If the ball is still in the ...

*January 31, 2012 by Anonymous*

**physics**

A 70.5kg football player is gliding across very smooth ice at 2.05m/s . He throws a 0.470kg football straight forward. What is the player's speed afterward if the ball is thrown at 14.5m/s relative to the ground? What is the player's speed afterward if the ball is thrown at 14...

*December 3, 2013 by k*

**Physics**

A 69.5kg football player is gliding across very smooth ice at 2.15m/s . He throws a 0.470kg football straight forward. What is the player's speed afterward if the ball is thrown at 16.0m/s relative to the ground? What is the player's speed afterward if the ball is thrown at 16...

*May 27, 2014 by Jenna*

**Physics**

A 69.5kg football player is gliding across very smooth ice at 2.15m/s . He throws a 0.470kg football straight forward. A) What is the player's speed afterward if the ball is thrown at 16.0m/s relative to the ground? B) What is the player's speed afterward if the ball is thrown...

*May 27, 2014 by David*

**Physics **

A 69.5kg football player is gliding across very smooth ice at 2.15m/s . He throws a 0.470kg football straight forward. A) What is the player's speed afterward if the ball is thrown at 16.0m/s relative to the ground? B) What is the player's speed afterward if the ball is thrown...

*May 27, 2014 by HELP PLEASE*

**science**

a bouncing ball of mass 200g leaves the ground with a kinetic energy of 10J a)if the ball rises vertically, calculate the maximum height it is likely to reach. b)in practice, the ball rarely reaches the maximum height. explain why this is so.

*December 1, 2011 by anabel*

**Math**

A rock is thrown upward from a bridge that is 88 feet above a road. The rock reaches its maximum height above the road 0.67 seconds after it is thrown and contacts the road 3.18 seconds after it was thrown. Define a quadratic function, f, that gives the height of the rock ...

*October 23, 2015 by David*

**Physics**

A boy's hand pushes a ball through a vertical distance of 1.45 m as he throws the ball straight upward. Once the ball leaves his hand it travels an additional 22 m (straight up) before returning to earth. Find the acceleration of the ball while it was in the boy's hand

*January 19, 2013 by Luellen*

**Physics**

A ball is thrown upwards with an initial velocity of 16 m/s. What is the velocity of the ball 1.5 s later? After the ball leaves the hand of the thrower, what is the value of acceleration acting on the ball as it is rising upwards? 9.8x1.5 = 14.7. 16-14.7=1.3 m/s after 1.5s. ...

*December 15, 2014 by Jim*

**physics help 2!!**

When a pitcher throws a curve ball, the ball is given a fairly rapid spin. A 0.15 kg baseball with a radius of 3.7 cm is thrown with a linear speed of 41 m/s and an angular speed of 37 rad/s. Assume that the ball is a uniform, solid sphere. Calculate how much of its kinetic ...

*October 18, 2008 by kelsey*

**physics**

A ball is thrown horizontally off the edge of a cliff with an initial speed of 20.4 m/s. (a) How long does it take for the ball to fall to the ground 20.3 m below? 1 s (b) How long would it take for the ball to reach the ground if it were dropped from rest off the cliff edge? ...

*February 16, 2012 by Anonymous*

**maths/physics**

A rubber ball weighs 49 N. What is the acceleration of the ball if an upward force of 69 N is applied?

*August 17, 2011 by Anonymous*

**physics**

a person throws a ball upward into the air with an initial velocity of 15 m/s calculate a)how high it goes? b)how long the ball is in the air before it comes back ? c)how much time it takes for the ball to reach the maximum height?

*November 19, 2011 by nour*

**PHYSICS**

Max is throwing a 57g tennis ball upward and hitting it (with a racket) when it reaches the top of its flight. If the racket exerts an average force of 440N on the ball, find the speed of the ball after the collision (if they are in contact for 4.5ms)

*April 5, 2013 by R*

**PHYSICS**

A tennis ball is thrown horizontally from an elevation of 20.60 m above the ground with a speed of 21.0 m/s vertical m from ground??? f the ball is still in the air, how long before it hits the ground? (If the ball is not in the air, enter 0.)???? If the ball is still in the ...

*January 30, 2012 by Anonymous*

**science**

An object is dropped off of a 27 meter tall building. How long is it in the air before it hits the ground? To measure the height of a tree, a person throws a ball vertically upward, and takes 13 seconds to reach its maximum height which is exactly the height of the tree. How ...

*February 5, 2012 by Anonymous*

**Math velocity **

A ball is thrown straight up from the edge of the roof of a 60.0 m tall building. If a second ball is dropped from the roof 2.0 s later what must the initial velocity of the first ball be if both are to reach the ground at the same time?

*June 22, 2015 by Tom*

**physics**

The spring in the muzzle of a child's spring gun has a spring constant of 780 N/m. To shoot a ball from the gun, first the spring is compressed and then the ball is placed on it. The gun's trigger then releases the spring, which pushes the ball through the muzzle. The ball ...

*March 21, 2012 by kassie*

**physics**

A tennis ball is thrown straight up with an initial speed of 19.5 m/s. It is caught at the same distance above the ground. (a) How high does the ball rise?

*September 30, 2010 by Tierney*

**physics**

A tennis ball is thrown horizontally at a speed of 10 m/s from the top of a building 78.4 meters high. How long does it take the ball to hit the street?

*May 22, 2012 by Elizabeth*

**physics**

A ball is thrown directly downward with an initial speed of 3.08 m/s from a height of 14.6 m. After what interval does the ball strike the ground? The acceleration of gravity is 9.8 m/s 2

*September 22, 2014 by Josie*

**Physics**

a BALL IS THROWN UPWARD WITH AN INITIAL VELOCITY OF 9.8 M/S FROM THE TOP OF A BUILDING. FILL A TABLE BELOW SHOWING THE BALLS POSITION,VELOCITY, and ACCELERATION AT THE END OF EACH OF THE 1ST 4SEC OF MOTION TIME(s) POSITION(M) VELOCITY(M/S) 1 2 3 4 Acceleration (M?S^2) Fill in ...

*February 11, 2015 by Tim*

**Physics**

A 0.26-kg rock is thrown vertically upward from the top of a cliff that is 32 m high. When it hits the ground at the base of the cliff, the rock has a speed of 32 m/s . Part A Assuming that air resistance can be ignored, find the initial speed of the rock. Part B Find the ...

*November 9, 2015 by Amanda*

**physics**

I have been stuck on this for a while now and cant figure out what it is i am doing wrong HELP!!! A tennis ball with a velocity of 15.5 m/s is thrown perpendicularly at a wall. After strik- ing the wall, the ball rebounds in the opposite direction with a speed of 9.3 m/s. If ...

*August 20, 2012 by Alex*

**Math**

A man throws a ball horizontally from the top of a hill 4.9m high. He wants the ball to clear a fence 2.4m high standing on horizontal surface and 8m horizontally away from the point of projection. Find the minimum speed at which the ball must be thrown.

*February 13, 2014 by Kiran*

**Physics **

A man throws a ball horizontally from the top of a hill 4.9m high. He wants the ball to clear a fence 2.4m high, standing on a horizontal surface and 8m horizontally away from the point of projection. Find the minimum speed at which the ball must be thrown.

*February 13, 2014 by Kiran*

**college physics**

a tennis ball is thrown straight up with an initial velocity of 22.5 m/s. it is caught at the same distance above the ground. a). how long does it take to reach its maximum height? b). how high does the ball rise? c). at what speed does it hit the ground? d). what total length...

*April 2, 2013 by confused*

**Physics**

A 0.350-kg ball is dropped from rest at a point 1.10 m above the floor. The ball rebounds straight upward to a height of 0.420 m. Taking the negative direction to be downward, what is the impulse of the net force applied to the ball during the collision with the floor?

*January 3, 2012 by Robert*

**Calculus-Aproximate Areas**

A ball is thrown upward at time t = 9 seconds on planet Ubuntu, and its acceleration from time t=9 seconds to t=21 seconds is given by the function . a(t) = (3) / (t - 8) m/s^2 Use 4 time intervals of equal length to overestimate, and then underestimate, the relative velocity ...

*November 6, 2013 by Sara*

**Physics**

suppose you are standing on the edge of a cliff 400 m high and you throw 2 balls in the air: one (ball a) directly upward with a speed of 17.6 m/s and one (Ball b) directly downward with a speed 17.6 m/s. 1.) how high will ball A rise? 2.) How long will it take Ball A to reach...

*February 9, 2014 by Juanita*

**Physics**

suppose you are standing on the edge of a cliff 400 m high and you throw 2 balls in the air: one (ball a) directly upward with a speed of 17.6 m/s and one (Ball b) directly downward with a speed 17.6 m/s. 1.) how high will ball A rise? 2.) How long will it take Ball A to reach...

*February 9, 2014 by Juanita*

**College Algebra**

A ball is thrown up from a twelve foot platform with an initial velocity of 112 feet/second. The formula that describes the height of the ball in terms of time is: f(t) = -16t^2+112t+12. Determine the time at which the ball reaches its maximum height. Determine the maximum ...

*August 11, 2011 by Lauren Marie*

**physics**

a Baseball player throws a ball for the outfield horizontally such that it is released 1.5 meters above the ground. if the ball is to reach second base 20.0 meters away, how fast must the ball be thrown so that is does not bounce before reaching the base

*September 30, 2014 by Kat*

**physics**

a baseball is thrown at an angle of 25 degrees relative to the ground at a speed of 23.0 m/s. if the ball was caught 42.0 m from the thrower, how hight was the tallest spot in the ball's path?

*October 4, 2009 by Zoomba21*

**Algebra**

A ball is thrown up with an initial velocity of 32 feet per second. How many seconds will it take for the ball to return to the ground using the formula h=vt-16t^2?

*March 25, 2012 by Zach*

**Engineering science**

A ball is thrown upwards and reaches the ground once again after 7sec how can I calc the total distance covered by the ball.

*June 12, 2016 by Thandeka*

**Physics **

If a ball is thrown off a 123 m cliff at a speed of 18 m/s, how far from the base of the diff is the ball? Givens: Unknown: Equation: Substitute: Solve:

*September 22, 2016 by Anonymous*

**math: pre-calculus **

List the transformations that will change the graph of g(x)=lnx into the graph of the given function h(x)=log(x+3)-8 a) Horizontally shift the graph to the right by 3; then vertically shift downward by 8. b) Horizontally shift the graph to the left by 8; then vertically shift ...

*May 8, 2016 by Nicky*

**Calculus**

Hard rubber ball is thrown down from a building with a height of 5 metres. After each bounce, the ball rises to 4/5 of its previous height. Total vertical distance d ball has travelled at the moment it hits the ground for the 8th time, to the nearest 10th of a metre, is.....

*September 18, 2011 by Anonymous*

**physics**

In the problem, please assume the free-fall acceleration g = 9.80 m/s2 unless a more precise value is given in the problem statement. Ignore air resistance. A stone is thrown vertically downward from the roof of a building. It passes a window 15.0 m below the roof with a ...

*September 4, 2012 by kevin*

**calculus**

A ball is thrown 12 meters in the air (so that the initial up-and-down distance is 24 meters). The ball rebounds 95% of the distance it falls. What is the total vertical distance traveled by the ball before it stops bouncing?

*November 12, 2014 by Anonymous*

**Calculus**

A ball is thrown from the origin of a coordinate system. The equation of its path is y = mx - e^2m/1000 . x^2, where m is positive and represents the slope of the path of the ball at the origin. For what value of m will the ball strike the horizontal axis at the greatest ...

*January 29, 2009 by Candy*

**physics4**

A baseball is thrown horizontally from a height of 11.20 m above the ground with a speed of 27.5 m/s. Where is the ball after 0.90 s have elapsed? The ball is 1 a horizontal distance of 2 m from the launch point.

*February 16, 2012 by Anonymous*

**physics**

A baseball is thrown horizontally from a height of 12.00 m above the ground with a speed of 25.5 m/s. Where is the ball after 0.80 s have elapsed? The ball is a horizontal distance of m from the launch point.

*February 17, 2012 by jen*

**physics**

a 7 kg ball is thrown into the air from ground level with an initial velocity of 24m/s. Determine the ball's maximum height. Use conservation of energy. help!!!

*November 16, 2014 by Isabelle*

**physics**

4. A ball is thrown so that it just clears a 3m fence 18m away. If it left the hand 1.5m above the ground and at an angle of 60° with the horizontal, what was the initial velocity of the ball?

*March 10, 2015 by steven*

**physics**

explain body is thrown vertically downward?

*May 22, 2011 by lala*

**Algebra**

Martina hits volley ball with an upward velosity of 13 M/s 1meterabove the grund. How long will it take for the ball to hit the ground.

*January 15, 2016 by Anonymous*

**physics**

A 2.2 kg bowling ball is dropped vertically from a height of 1.5 m onto a long compression spring (k = 150 N/m) placed vertically underneath it. What is the maximum compression of the spring?

*June 4, 2014 by grey*

**physics conservation of momentum**

A 0.5 kg ball is thrown horizontally towards a wall with a speed of 10 m/s. The initial velocity is chosen to be the positive x-direction for this question. The ball horizontally rebounds back from the wall with a speed of 10 m/s in the negative x-direction. What is momentum ...

*November 8, 2008 by rachel*

**phy**

(Q1)What is the orbital radius and speed of a synchronous satellite which orbits the earth once every 24h? Take G=0.0000000000667Nm2/kg2. Mass of the earth is 598000000kg (a)4200000m and 31000m/s (b)5600000m and 4300m/s (c)430000m and 5000m/s(d)3400000m and 6000m/s (Q2) A ball...

*July 5, 2013 by ikye*

**Physics**

a 1kg ball is thrown into the air with an initial velocity of 30 m/sec. how much kinetic energy does the ball have? -how much potential energy does the ball have when it reaches the top of its ascent? -how high into the air did the ball travel?

*November 22, 2009 by Kim*

**physics**

You throw a 0.15 kg ball straight upward from ground level with an initial speed of 15 m/s. (Yes, from ground level. This is to make the calculations easier. If it bothers you, imagine you are standing in a dugout.) Your friend throws a 0.09 kg lump of clay upward after it. ...

*February 28, 2016 by Shelby*

**physics**

a body of mass 5kg is thrown vertically upwards with a speed of 10m/s. what is its kinetic energy when its thrown? find its potential energy when it reaches at the highest point. also find the maximum height attained by the body[g=10m/s]

*February 27, 2012 by akansha*

**physics**

a body of mass 5kg is thrown vertically upwards with a speed of 10m/s. what is its kinetic energy when its thrown? find its potential energy when it reaches at the highest point. also find the maximum height attained by the body[g=10m/s]

*February 27, 2012 by akansha*

**earth**

On planet Tehar, the free-fall acceleration is the same as that on Earth but there is also a strong downward electric field that is uniform close to the planet's surface. A 2.00 kg ball having a charge of 5.00 µC is thrown upward at a speed of 29.2 m/s and it hits the ground ...

*October 18, 2010 by Anonymous*

**earth**

On planet Tehar, the free fall acceleration is the same as that on the Earth, but there is also a strong downward electric field that is uniform close to the planets surface. A 2.00k ball having a charge of 5.00C is thrown upward at a speed of 20.1 m/s. It hits the ground ...

*December 14, 2010 by Anonymous*

**Physical science**

A ball is thrown up at 8m.s from the roof which is 60m high.it strikes the balcony below after 4s.the ball then bounces off the balcony and strikes the ground.ignore the effects of friction.calculate magnitude of the velocity at which the ball strike the balcony?

*April 24, 2013 by lebogang*

**College Physics**

A batted baseball is hit with a velocity of 47.3 m/s, starting from an initial height of 8 m. Find how high the ball travels in two cases: (a) a ball hit directly upward and (b) a ball hit at an angle of 70° with respect to the horizontal. Also find how long the ball stays in ...

*September 12, 2011 by HELP*

**College Physics**

A batted baseball is hit with a velocity of 47.3 m/s, starting from an initial height of 8 m. Find how high the ball travels in two cases: (a) a ball hit directly upward and (b) a ball hit at an angle of 70° with respect to the horizontal Also find how long the ball stays in ...

*September 12, 2011 by HELP*

**Physics **

A baseball is thrown at an angle of 25 degrees relative to the ground at a speed of 23.0 m/s. If the ball was caught 42.0 m from the thrower, how long was it in the air? How high was the tallest spot in the ball's path?

*October 26, 2010 by Luis *

**Physics**

A(n) 0.491 kg football is thrown with a speed of 17.8 m/s. A stationary receiver catches the ball and brings it to rest in 0.0147 s. What is the magnitude of the impulse de- livered to the ball? Answer in units of kg · m/s

*January 27, 2015 by HELP PLEASE*

**Physics**

Continue walking at a constant speed. This time, stop instantly just after you release the ball upward. Where does the ball land?

*March 8, 2015 by Marisa*

**Physics**

Continue walking at a constant speed. Just after you release the ball upward, break into a run. Where does the ball land?

*March 8, 2015 by Marisa*

**science **

A Football is thrown by a quarterback to a receiver. When the quarterback throws it, the ball is at the height of 6 feet above the ground. When the receiver catches it, he is 30 yards away from the quarterback and the ball is again at a height of 6 feet above the ground. The ...

*May 2, 2016 by Sampson *

**physics**

An object is projected vertically upwards with a velocity of 28m/s. Two seconds later, another object is thrown vertically upwards with a velocity of 32 m/s. When and where will the two objects meet?

*September 28, 2011 by Lola312*

**Physics**

A ball is thrown horizontally from the roof of a building 29.7 m high at 39.6 m/s. (a) What is the vertical velocity of the ball when it lands? (use down as the positive y-axis direction)b) What is the ball’s total velocity (speed and direction) when it lands?

*January 23, 2012 by Katie*

**Science**

A ball is thrown from a cliff at a horizontal speed of 3m/second and at the same time a second ball is dropped straight down from the cliff. How fast will the dropped ball be going after 2 seconds?

*October 26, 2009 by Steve Felton*

**Math**

A ball is thrown straight up from a bridge over a river and falls into the water. The height, h, in meters, of the ball above the water t seconds after being thrown is approximately modeled by the relation h=-5t^2+10t+35. Can you please help me ! Show your work. a) What is the...

*November 26, 2014 by Alex*

**Physics**

A ball is thrown with initial velocity Vo=20.0 m/s from the top of a 50.0m tall building. Find the velocity Vg with which the ball strikes the ground. Find time Ttotal it takes for the ball to move to the ground.

*July 10, 2011 by Myyke*

**Physics**

You can use any coordinate system you like in order to solve a projectile motion problem. To demonstrate the truth of this statement, consider a ball thrown off the top of a building with a velocity v at an angle è with respect to the horizontal. Let the building be 50.0 m ...

*August 30, 2009 by Annmay*

**physics**

On planet Tehar, the acceleration of gravity is the same as that on Earth but there is also a strong downward electric field with the field being uniform close to the planet's surface. A 2.16 kg ball having a charge of 4.80 uC is thrown upward at a speed of 21.0 m/s and it ...

*September 8, 2010 by VJC*

**Physics**

The acceleration due to gravity on the moon is about one sixth its value on earth. If a baseball reaches a height of 62 m when thrown upward by someone on the earth, what height would it reach when thrown in the same way on the surface of the moon? Answer in units of m

*September 17, 2011 by Joe*

**physics**

The acceleration due to gravity on the moon is about one-sixth its value on earth. If a baseball reaches a height of 78 m when thrown upward by someone on the earth, what height would it reach when thrown in the same way on the surface of the moon? Answer in units of m

*September 20, 2014 by isaiah*

**algerbra**

The function h = -t2 + 95 models the path of a ball thrown by a boy where h represents height, in feet, and t represents the time, in seconds, that the ball is in the air. Assuming the boy lives at sea level where h = 0 ft, which is a likely place the boy could have been ...

*April 11, 2016 by Crystal*

**physics**

When a man throws a ball vertically up his watch fall down from his hand.if the initial speep of the ball is 20m/s from a building.what will be its velocity when it reaches the ground if the height difference b/n them is 100m?

*April 2, 2012 by minas*

**Physics**

A person throws a ball upward into the air with an initial velocity of 15.0 m/s. Calculate the following: a.) how high it goes. b.) how long the ball is in the air before it comes back to his hand. c.) at what time(s) will the ball pass a point 8.00 m. If you got multiples ...

*September 26, 2011 by Jane*

**Physics**

A person throws a ball upward into the air with an initial velocity of 15.0 m/s. Calculate the following: a.) how high it goes. b.) how long the ball is in the air before it comes back to his hand. c.) at what time(s) will the ball pass a point 8.00 m. If you got multiples ...

*September 27, 2011 by Phil*

**Physics**

A ball is thrown directly downward, with an initial speed of 7.40 m/s, from a height of 31.0 m. After what time interval does the ball strike the ground? I thought it would be 31 m / 7.40 = 4.18 seconds, but it's the wrong answer.

*October 10, 2009 by Beth*

**physics**

A major-league pitcher can throw a ball in excess of 44.4 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches a catcher who is 17.0 m away from the point of release?

*February 10, 2011 by frost*

**physics**

A major-league pitcher can throw a ball in excess of 37.8 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches a catcher who is 17.0 m away from the point of release?

*June 23, 2013 by louis aaaa*

**science **

solved a ball is dropped from the top of a tower 100 meter high. simultaneously another ball is thrown upwards from ground with a speed of 50 m/s . after what time do they cross each other.

*September 10, 2014 by pinki *