Travelling together at the same speed, a truck and a small car reach a hill. Why does the truck’s speed fall below the car’s as they start their climb?

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?