A1,200kg car rolls down a hill with its brakes off and transmission in neutral. at one moment, it is moving 5.0m/s. a little later, it is moving at 8.2 m/s. how much did its height change between the two times? assume no friction or air resistance.

Taylor's experiment: 1. accurately measured the speed of light 2. locked together the phases of two light sources so that the interference pattern would not shift 3. showed that man's reaction time was much slower than the speed of light 4. showed that individual photons have wave characteristics

Plss anybody know how to do this? ? i need the answers from a through d

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?