Question

a 10 - gram rubber ball was launched at a wall several times. the speed of the ball was measured after it hit the wall and bounced off. the force that the ball applied to the wall was also measured. the table below shows the data collected during the investigation.
force investigation data

force on wall	return speed after bounce
1.5 n	9 m/s
2.0 n	18 m/s

according to the data, what happens to the ball when it applies more force to the wall?
a. the balls return speed increases because balanced forces cause motion.
b. the wall pushes back on the ball with more force, which causes the return speed of the ball to increase.
c. the wall pushes back on the ball with less force, which causes the return speed of the ball to decrease.
d. the balls return speed decreases because the balanced forces cancel each other out.

Explanation:

According to Newton's third - law of motion, for every action, there is an equal and opposite reaction. When the ball applies more force to the wall, the wall applies more force back on the ball. This increased force from the wall causes the ball's return speed to increase. Balanced forces do not cause motion (eliminate A and D), and as the ball applies more force to the wall, the wall pushes back with more force, not less (eliminate C).

Answer:

B. The wall pushes back on the ball with more force, which causes the return speed of the ball to increase.