Atennis ball is dropped from 1.51 m above the ground. it rebounds to a height of 0.903 m. with what velocity does it hit the ground?

The velocity with which the ball strikes the ground = -5.4 m/s

Explanation:

To find the velocity with which the tennis ball hits the ground, we only need to worry about what happens up to that point. We can ignore the rebound for this part. Given:

d = -1.51

a = -9.8

vi = 0

vf = ?

*Keep in mind that the square root gives us two answers, a positive and a negative one. We use the negative one here because the final speed is downwards and I've designated down as the negative direction.

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force