Aball of mass 0.05 kg strikes a smooth wall normally four times in 2 second with a velocity of 10m/s. each time the ball rebounds with the same speeds of 10m/s. calculate the average force on the wall

Answer" The average force on the wall be equal to 0.5 N.

Explanation:

To calculate the average force on the wall, we use the following equation:

where,

F = average force = ?N

m = mass of the ball = 0.05kg

= Initial velocity of the ball = -10m/s (negative sign because the ball rebounds)

= Final velocity of the ball = 10m/s

t = time taken by the ball = 2s

Putting values in above equation, we get:

Hence, the average force on the wall will be equal to 0.5N.

the answer would be c

the part of the wave he is travelling on is the crest