5:24 ml 563 E

5:24 5G8 38 1. A car possesses 20 000 units of momentum. What would be the car's new momentum if a. its velocity was doubled. b. its velocity was tripled. c. its mass was doubled (by adding more passengers and a greater load) d. both its velocity was doubled and its mass was doubled. 2. A force for 4000 N is applied on the object for 0.010 sec. Find the Impulse. 3. A turtle (mass of 1 kg) does push-ups by applying a force to elevate its center-of-mass by 5 cm (0.05 m). Estimate the number of push-ups that a tired turtle must do in order to do a approximately 5.0 Joules of work. 4. When doing a chin-up, a physics student lifts her 42.0-kg body a distance of 0.25 meters in 2 seconds. What is the power delivered by the student's biceps? W = 102.9 J 5. A 900-kg compact car moving at 60 mi/hr has approximately 320 000 Joules of kinetic energy. Estimate its new kinetic energy if it is moving at 30 mi/hr. 6. Calculate the GPE of Ikg rock at the height of 1000 m.