A 50 g rubber ball flying horizontally at a speed of 72 km / h hits a vertical wall absolutely resiliently

A 50 g rubber ball flying horizontally at a speed of 72 km / h hits a vertical wall absolutely resiliently. Estimate the force of the ball hitting the wall if the contact lasted 0.05 s.

Problem data: m (the mass of the rubber ball) = 50 g (in the SI system m = 0.05 kg); V (ball speed) = 72 km / h (SI V = 20 m / s); t (duration of contact of the rubber ball with the wall) = 0.05 s.

We calculate the force of the rubber ball hitting the wall using the equality: F * t = m * V, whence F = m * V / t.

Let’s perform the calculation: F = 0.05 * 20 / 0.05 = 20 N.

Answer: The force of impact of the rubber ball on the wall is 20 N.