Homework # 34 - Energy Handout Problems: 1. Determine from the expression for kinetic energy (KE = 1/2 mv ) the combination of units, kilograms, meters, and seconds that is equivalent to the joule. 2. (a) What is the kinetic energy of a 4.0-kg mass moving at 5.0 m/s? (b) If the mass was accelerated to this speed from rest by a force of 20 N, over how long a distance did it act (use W = F.d)? 3. A force of 10 N is applied to a small cart for a distance of 2.0 m. (a) What work is done on the cart? (b) Assuming there are no frictional losses, what final kinetic energy does the force transfer to the cart? (c) If the mass of the cart is 10 kg, what is the final speed of the cart? 4. The speed of a 1600 kg car increases uniformly from 20 m/s to 30 m/s. (a) What is the increase in its kinetic energy? (b) If the acceleration increases over a distance of 50 m, what force is accelerating the car? 5. What potential energy does a 60.0-kg gymnast acquire in climbing 7.00 m up a vertical pole