After the impact, a puck with a mass of m = 200 g slides on horizontal ice.

After the impact, a puck with a mass of m = 200 g slides on horizontal ice. Determine the work of the friction force when the washer moves by Δr = 50 m. The coefficient of friction of the washer on ice is u = 0.10.

The friction work can be calculated using the formula:
A = Ftr * S, where Ftr is the friction force (Ftr = µ * N, where µ is the coefficient of friction of the washer on ice (µ = 0.1), N is the support reaction force, (N = Ft (gravity) = m * g, where m is the mass of the washer (m = 200 g = 0.2 kg), g is the acceleration of gravity (we take g = 10 m / s ^ 2))), S is the displacement of the washer (S = 50 m).
Let’s calculate the work of the friction force:
A = Ftr * S = µ * N * S = µ * m * g * S = 0.1 * 0.2 * 10 * 50 = 10 J.
Answer: The work of the friction force is 10 J.