1. To accelerate from 0 to 32 miles per hour a car's engine has to make an amount of work equal to W1. To further accelerate from 32 miles per hour to 64 miles per hour will require the additional work W2 from the car's engine. How is the amount of work required to go from 32 miles per hour to 64 miles per hour compare to the amount of work required to accelerate from 0 to 32 miles per hour? [Hint: Remember that the work expended equals the change in kinetic energy.]

Explain

2. A car is going 10 miles per hour when the driver hits the breaks. The car travels 3 feet after the brakes are applied. A little while later, the same car is going 20 miles per hour. This time, when the driver hits the brakes about how far does the car travel after the brakes are applied?

Explain

3. Use conservation of energy to calculate from what height on Planet Spiro would you have to drop a ball so that it would have a speed of 25.0 [m/s] just before it hit the ground? If you don't have enough information, explain what additional information you need.