Know how to solve these? Two cars equal mass (1,000 kg each) involved in a rear wnd accident at a stop sign. Here is what you know.

. Car 1 approached intersection from the top at 25 meter hill.

. Car 2 was on a flat stretch of road directly in front of Car 1

. At the bottom of the hill, Car 1 was going 20 m/s, Car 2 at 30 m/s before it stopped at the stop sign.

. There was no skid marks left by Car 2. The collision occurred at the stop sign, where car 2 had stopped.

. After the collision, both cars were moving together in the same direction at 10 m/s before slowly rolling to a stop.

. You must now push Car 2, using 800N of force, 10 meters off to the side of the road so no one gets hurt.

10. Which of the two laws convered in this unit- Law of conservation of momentum of law of conservation of energy-is obeyed in this problem? Explain your reasoning.

11. How much work did it take to moce Car 2 off to the side of the road?

12. If it took you 40 seconds to move car 2 off the road, how much power did you expend?

13. Which simple machine does a car ahve that helped you move Car 2? Explain.