A 0.17 kg hockey puck leaves the stick on a slap shot traveling 21 m/s. If no other forces act on the puck, friction eventually will bring it to rest 62 m away.
a) Based on these data, determine the value of μ for this hockey puck on ice.
b) Will the answer change if a puck of different mass, but same material and shape is used? Explain why or how not.

Question

A 0.17 kg hockey puck leaves the stick on a slap shot traveling 21 m/s. If no other forces act on the puck, friction eventually will bring it to rest 62 m away.
a) Based on these data, determine the value of μ for this hockey puck on ice.
b) Will the answer change if a puck of different mass, but same material and shape is used? Explain why or how not.

zephyr141 · Answer

as always, draw your free body diagram. then set the forces in the the x and y directions equal to 0. then solve for the normal force which would be in the y direction then using that and that friction is$$f_k=\mu N$$ solve for the coefficient of friction in the force equation in the x direction. you have inititial velocity, mass of the puck, and final velocity. this is all you need for this problem.