A tennis ball with the speed of 23.6 m/s is moving perpendicular to a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 14.042 m/s. If the ball is in contact with the wall for 0.0138 s, what is the average acceleration of the ball while it is in contact with the wall? Take “toward the wall” to be the positive direction.
Answer in units of m/s^2

the first step is making objective observations.

they have to be based on a certain event and can be confirmed by others if it is right or not.

answer: point c: b. 1/2 potential, 1/2 kinetic, point a: 3/4 of its potential energy, point d or b: 3/4 potential, 1/4 kinetic

explanation: i cant explain. it's difficult to explain.

this means that the temperature of both substances will be equal

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it