The goalkeeper kicks a 400 g soccer ball flying at a speed of 20 m / s. The goalkeeper’s contact with the ball lasted 0.02 seconds.

The goalkeeper kicks a 400 g soccer ball flying at a speed of 20 m / s. The goalkeeper’s contact with the ball lasted 0.02 seconds. Determine the force acting on the ball.

First, we translate grams into kilograms 400 g = 0.4 kg
Secondly, using the formula F = ma, we can find the force, but we do not have acceleration (a), and to find the acceleration, go to the next point 🙂
Thirdly, since we have an initial and final V = 0, we can find a by the formula a = V-Vo / t, and we get 1000 m / c ^ 2
And fourth, we plug in the values and get
0.4 * 1000 = 400 H
Answer F = 400 H