To drive a car at a constant velocity, you have to hit the gas. That's because
A. the car needs to create a force to
offset the other forces acting on it.
B. all objects need a net forward force to keep moving.
C. the car must accelerate to keep a constant velocity.
D. otherwise the car would move in a circle.

What object a collides with object b and bounces back its final momentum is?

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix. b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds. c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer. d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?