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# PS8 - Problem Set 8 1 A 0.600 kg particle has a speed of...

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Problem Set 8 1. A 0.600 kg particle has a speed of 2.00m/s at point A and kinetic energy of 7.50 J at point B. What is a. Its kinetic energy at A b. Its speed at B c. The total work done by the particle as it moves from A to B 2. A crate of mass 10.0 kg is pushed up along a rough incline with an initial speed of 1.5m/s. The pulling force is 100N parallel to the incline, which makes an angle of 20 with the horizontal. The coefficient of kinetic friction is 0.400 and the crate is pulled 5.0m. a. How much work is done by the gravitational force on the crate b. Determine the increase in the energy of the crate incline system due to friction c. How much work is done by the 100N force on the crate d. What is the change in the kinetic energy of the crate e. What is the speed of the crate after being pulled 5.00m 3. A 650 kg elevator starts from rest. It moves upward for 3.00 s with a constant acceleration until it reaches a cruising speed of 1.75m/s.

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