Question

A football team' s kicker punts the ball (mass= 0.4 kg) and gives it a launch speed of 30 m/s. Find the impulse delivered to the football by the kicker's foot and the average force exerted by the kicker on the ball, given that the impact time is 8 ms.​

Answer 1

12 Ns

1500 N

Step-by-step explanation:

Impulse is the change in momentum.

J = Δp

J = mΔv

J = (0.4 kg) (30 m/s)

J = 12 kg m/s

J = 12 Ns

Impulse is force times impact time.

J = FΔt

F = J/Δt

F = (12 Ns) / (0.008 s)

F = 1500 N