Which statement is true about acceleration?
A. It is the rate of change of speed per unit time.
B. It is the rate of change of displacement per unit time.
OC. It is the rate of change of velocity per unit time.
D. It is the rate of change of position per unit time.

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?

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

A1000-kg car is moving at 30 m/s around a horizontal unbanked curve whose diameter is 0.20 km. what is the magnitude of the friction force required to keep the car from sliding?