During a hockey game,a puck is given an initial speed of 10 m/s.It slides 50 m on the horizontal ice before it stops due to friction.What is the coefficient of kinetic friction between the puck and the ice?
A)0.090
B)0.10
C)0.11
D)0.12

Question

Quizplus · Accepted Answer

The work done by friction is equal to the initial kinetic energy of the puck. Using the work-energy principle and the formula for frictional force, we can solve for the coefficient of kinetic friction: $ \mu_k = \frac{v^2}{2gd} $. Substituting the given values, $ \mu_k = \frac{10^2}{2 \times 9.8 \times 50} = 0.10 $.

During a Hockey Game,a Puck Is Given an Initial Speed