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Physics Assignment for IT 2

Answer the following problems and submit on Monday, 5/14/2012

  1. 1. A shopper in a supermarket pushes a cart with a force of35 N directed at an angle of 25° downward from the horizontal.Find the work done by the shopper as she movesdown a 50-m length of aisle.
  2. 2. A 7.00-kg bowling ball moves at 3.00 m/s. How fast must a2.45-g Ping-Pong ball move so that the two balls have the same kinetic energy?
  3. Find the height from which you would have to drop a ball so that it would have a speed of 9.0 m/s just before it hits the ground.
  4. The electric motor of a model train accelerates the train from rest to 0.620 m/s in 21.0 ms. The total mass of thetrain is 875 g. Find the average power delivered to the train during its acceleration.
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