The puck, launched at a speed of 10 m / s, travels a distance of 50 m. How long does the puck slide on the ice.

Initial data: V0 (initial speed of the washer) = 10 m / s, V (final speed of the washer, the washer stopped) = 0 m / s, S (distance traveled by the washer) = 50 m.

1) Find the acceleration of the puck.

V = V0 + a * t.

0 = V0 + a * t and a = -V0 / t.

2) Calculate the sliding time of the puck on the ice:

S = (V² – V0²) / 2a = -V0² / (2 * (-V0 / t)) = V0 * t / 2.

2S = V0 * t and t = 2S / V0.

Let’s do the calculation:

t = 2 * 50/10 = 100/10 = 10 s.

Answer: The puck slides on the ice for 10 seconds.