A resting hockey puck weighing 250 g, after being hit with a stick that lasted 0.02 s, glides

A resting hockey puck weighing 250 g, after being hit with a stick that lasted 0.02 s, glides on the ice at a speed of 30 m / s. Determine the average impact force.

We find the acceleration of the puck from the formula V = Vo + at Since the initial speed of the puck = 0, V = at We express the acceleration from here a = V / t = 30 / 0.02 = 1500 m / s ^ 2 (meters divided by a second squared). According to Newton’s 2nd law, F = ma = 0.25 kg x 1500 m / s ^ 2 = 375 N.