2) 3) 4) 5) 6) Angular Kinematics: An automobile engine slows down from 4500 rpm to 1200 rpm in 2.5 s. a) What is 4500 rpm in radis? HINT rpm is revolutions per minute b] Calculate the average angular acceleration as the engine slows down c) The total number of revolutions the engine makes in this time. Hint: Determine number of radium rst. Torque: Can a smaller force exert a greater torque than a larger force? Explain. Torque: Adult chimpanzees have muscle mass of only about ] E3 of an adult human male, but it has been shown to be over twice as strong in some movements. Can you account for this? Hint: Think about attachment position of muscle to the bone at the elbow. WorkEnergy, F rict'iort, WorkForce distance A 1000 kg car has an initial velocity v; of 16.? mis (60kmfhr) a) How much Kinetic energy does the car have? b} How much work would you need to do on the car to bring it to a stop? In your attempt to slow the car down you lock up the brakes so the car is skidding to a halt. e) What is the friction force on the car if the kinetic coefficient of friction between tyres and road, M, is 0.5? all ** How much room (distance) is needed to bring the car to a stationary stop? Conservation of Mechanical Energy To leap and clear a 200 to building Superman jumps to a height of215 m. Neglecting Air resistance a) At a height of215 tn what is Superman's potential energy (assume his mass is lOOkg)? b) Using the answer to part {a}, what was Superman's initial vertical velocity in order for him to reach 215 m? ** Use the same considerations to determine Superman's vertical velocity at 200 m