4 A ball is thrown straight upward with a speed v from a point h meters above the ground. Show that the time
taken for the ball to strike the ground is (v/8)[1 + 1 + (2hg/v2)).​

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

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little

If a negatively charged particle is placed at rest in an electric potential field that increases in the positive x-direction, what will the particle do? a. accelerate in the positive x-direction b. remain at rest c. accelerate in the negative x-direction