for both of these object

system1: earth and ball
if a ball is falling down, is the work done on it positive since force and displacement are in the same direction.

system 2: earth and basket
a basket is tied to a rope and is dropped then come to a full stop, then is the work done also positive as well

  1. 👍
  2. 👎
  3. 👁
  1. System 1: Yes, work is done by the gravitational field. Work done is the same as the loss of potential energy.

    System 2: Work is done while it falls, but when it stops, all that work (which became kinetic energy) is converted to heat.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    A 50 kg skater at rest on a frictionless rink throws a 2 kg ball, giving the ball a velocity of 10 m/s. Which statement describes the skaters subsequent motion? Explain please. a. 0.4 m/s in the same direction as the ball. b. 0.4

  2. Physics

    A 0.280 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. (a) What is the mass of the second ball? (b) What fraction

  3. Physics

    A 0.100 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. (a).what is the mass of the second ball? (b).What fraction

  4. physics

    a ball is dropped from the top on an 80-m high building. what speed does the ball have in falling 3.5 s?

  1. physics

    On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. The free-fall acceleration on the moon is 1/6 of its value on earth. Suppose he hits the ball with a speed of 25

  2. physics

    A 3.00 kg ball is dropped from the roof of a building 176.4 m high. While the ball is falling to Earth, a horizontal wind exerts a constant force of 12.0 N on it. a.)How far from the building does the ball hit the ground? b.)How

  3. Calculus

    Suppose a ball is thrown straight up into the air, and the height of the ball above the ground is given by the function h(t) = 6 + 37t – 16t2, where h is in feet and t is in seconds. At what time t does the ball stop going up

  4. science

    Read the scenario, then answer the questions. A 2 kg ball is thrown upward with a velocity of 15 m/s. What is the kinetic energy of the ball as it is being thrown? ____J What is the potential energy of the ball when it gets to its

  1. Physics

    You are hitting a tennis ball against a wall. The 0.057-kg tennis ball traveling at 29 m/s strikes the wall and rebounds at the same speed. Earth is the object of reference. Determine the ball's change in momentum (magnitude).

  2. physics

    A trained dolphin leaps from the water with an initial speed of 12 m/s. It jumps directly towards a ball held by the trainer a horizontal distance of 5.50 m away and a vertical distance of 4.10 m above the water. In the absence of

  3. Physics

    please check these: 1. which of the following statements applies to the motion of a ball rising and then falling in free fall? I.The ball has constant acceleration as it moves upward. II.The ball has constant acceleration at the

  4. Physics- Momentum

    A 170g cue ball is moving at 3.0 m/s when it strikes a 160g stationary numbered ball (object ball). After the collision the balls move off as shown. Determine the speed of the cue ball and the numbered (object) ball after the

You can view more similar questions or ask a new question.