a. 4kg soccer ball approaches a player horozontally with a velocity of 18 m/s to the north. The player strikes the ball and causes it to move in the opposite direction with a velocity of 22 m/s. What impulse was delivered to the ball by the player?

Answer:160Ns

Explanation:

Mass (m) = 4kg

Initial velocity (u) = 18m/s

Final velocity (v) = 22m/s

impulse=change in momentum

Impulse=m (v-u)

Since it's moving in opposite direction impulse=m (v - (-u))

Impulse=4 (22 - (-18))

Impulse=4 (22+18)

Impulse=4x40

Impulse=160Ns