If there is motion, then a force in acting true or false

Acar travels along a highway with a velocity of 24 m/s, west. the car exits the highway; and 4.0 s later, its instantaneous velocity is 16 m/s, 45° north of west. what is the magnitude of the average acceleration of the car during the four-second interval?

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity