Question

Ana kicks a stationary 0.2 kg soccer ball. The ball leaves her foot at a speed of 20 m/s.

a. What impulse was delivered to the ball?
b. The ball experiences 40N of force during the kick. How long were the ball and
foot in contact?

Answer 1

a. 24 kg m/s

b. 3/5s

Step-by-step explanation:

a.impulse is the change in momentum so at first the momentum is zero because the ball was at rest and the final momentum is 1.2kg*20m/s=24 kg m/s

so the impulse would be (24-0) kg m/s=24 kg m/s

b. so the impulse equation is impulse is force *delts time

so 24 kg m/s=40N*t

t=24 kg m/s /40N=3/5 s