HELP ASAP HELP Two tennis balls of the same mass are served at different speeds: 30 m/s and 60 m/s. Which serve has more kinetic energy and by how much? Defend your answer. *

The second ball has four times as much kinetic energy as the first ball.

Explanation:

Kinetic Energy

Is the type of energy an object has due to its state of motion. It's proportional to the square of the speed.

The equation for the kinetic energy is:

Where:

m = mass of the object

v = speed at which the object moves

The kinetic energy is expressed in Joules (J)

Two tennis balls have the same mass m and are served at speeds v1=30 m/s and v2=60 m/s.

The kinetic energy of the first ball is:

The kinetic energy of the second ball is:

Being m the same for both balls, the second ball has more kinetic energy than the first ball.

To find out how much, we find the ratio:

Simplifying:

The second ball has four times as much kinetic energy as the first ball.

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray