Physics Questions & Answers

Physics Questions & Answers A 1000-kg car and a 2000-kg car are hoisted the same distance. Raising the more massive car requires... - CORRECT ANSWER- twice as much work A 2-kg mass is held 4 m above the ground. What is the approximate potential energy of the mass with the respect to the ground? - CORRECT ANSWER- 80 J A ball is projected into the air with 100 J of kinetic energy which is transformed to gravitational potential energy at the top of its trajectory. When it returns to its original level after encountering air resistance, its kinetic energy is... - CORRECT ANSWER- less than 100 J A ball rolling down an incline has its maximum kinetic energy at... - CORRECT ANSWER- the bottom A bow is drawn so that it has 40 J of potential energy. When fired, the arrow will ideally have a kinetic energy that is... - CORRECT ANSWER- 40 J A car moving at 50 km/hr skids 20 m with locked brakes. How far will the car skid with locked brakes if it were traveling at 150 km/hr? - CORRECT ANSWER- 180 m A diver who weighs 500 N steps off a diving board that is 10 m above the water. The diver hits the water with kinetic energy of... - CORRECT ANSWER- 5000 J A job is done slowly, while an identical job is done quickly. Both jobs required the same amount of work, but different amounts of... - CORRECT ANSWER- power