A student drops a ball from a height of 40.0m. If the ball increases speed at a uniform rate of 9.81m/s2, determine all unknowns and answer the following
questions.
How long did the ball remain in the air?
What was the ball's speed just before striking the ground?

Asher cycles 12 miles in 16 hours. what is his speed?

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?