physics

A 1.5 kg snowball is fired from a cliff 12.5m high with an inital velocity of 14 m/s directed 41 degrees above the horizontal.
a) how much work is done on the snowball by the gravitaitonal force during its flight to the flat ground below the cliff?
b) what is the change in the gracitational potential energy of the snowball-Earth system during the flight?
c) If that gravitational potential energy is taken to be zero at the height of the cliff, what is its value when the snowball reaches the ground?

a) Is this the equation I would use: mgh= 1/2mv^2?
For b) and c) can you please explain to me how I would solve these problems?

Yes for a.
There is no change in total gpe. What work is done on the snowball by gravity to change its KE is equal.
c: if the top is zero, then the bottom is -h, and gpe is -mgh

  1. 👍 0
  2. 👎 0
  3. 👁 462
asked by Jamie

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    A 0.720 kg snowball is fired from a cliff 8.10 m high. The snowball's initial velocity is 14.2 m/s, directed 30.0° above the horizontal. (a) How much work is done on the snowball by the gravitational force during its flight to

    asked by VitaX on October 16, 2010
  2. Physics

    A 1.50 kg snowball is fired from a cliff 13.0 m high with an initial velocity of 14.0 m/s, directed 41.0° above the horizontal. (a) Using energy techniques, rather than techniques of Chapter 4, find the speed of the snowball as

    asked by Matt on July 24, 2010
  3. Physics/Math

    A 1.50 kg snowball is fired from a cliff 12.5 m high with an initial velocity of 14.0 m/s, directed 41.0° above the horizontal. (a) Using energy techniques, rather than techniques of Chapter 4, find the speed of the snowball as

    asked by Technoboi11 on March 7, 2007
  4. Physics/Math

    A 1.50 kg snowball is fired from a cliff 13.5 m high with an initial velocity of 14.0 m/s, directed 41.0° above the horizontal. (a) Using energy techniques, rather than techniques of Chapter 4, find the speed of the snowball as

    asked by Technoboi11 on March 11, 2007
  5. Physics

    After a snowstorm a boy and girl decide to have a snowball fight. The girl uses a large slingshot to shoot snowballs at the boy. Assume that the girl fires each snowball at an angle 0 from the ground and that the snowball travel

    asked by JIm on February 23, 2015
  6. physics

    a cannon ball is shot from a 100 m high cliff with an inital velocity of 24m/s and at an angle of 32 degrees. what is the overall final velocity of the cannonball?

    asked by Connor on September 21, 2010
  7. Physics

    A cannon ball is fired horizontally with velocity of 15m from the top of a cliff 90m high.after how many seconds will it hit the foot of the cliff(a)time (b)at what distance from the foot of the cliff will it strike.

    asked by Anonymous on October 25, 2014
  8. Physics

    A cannon ball is fired horizontally with a velocity of 50m/s from the top of a cliff 90m high,after how many seconds will it strike the plane at the foot of the cliff.at what distance from the foot of the cliff will it strike and

    asked by Temi on January 26, 2014
  9. Science

    A cannon ball is fired horizontally with a velocity of 50m/s from the top of a cliff 90m high,after how many seconds will it strike the plane at the foot of the cliff.at what distance from the foot of the cliff will it strike and

    asked by Temi on January 26, 2014
  10. Physics

    A cannon ball is fired horizontally with a velocity of 50m/s from the top of a cliff 90m high,after how many seconds will it strike the plane at the foot of the cliff.at what distance from the foot of the cliff will it strike and

    asked by Temi on January 26, 2014

More Similar Questions