Author Question: Doug hits a hockey puck, giving it an initial velocity of 7.0 m/s. If the coefficient of kinetic ... (Read 124 times)

nevelica · **on:** Jul 28, 2018

Doug hits a hockey puck, giving it an initial velocity of 7.0 m/s. If the coefficient of kinetic friction between ice and puck is 0.050, how far will the puck slide before stopping?
a. 19 m
c. 37 m
b. 25 m
d. 50 m

Question 2

A horizontal force of 750 N is needed to overcome the force of static friction between a level floor and a 250-kg crate. What is the acceleration of the crate if the 750-N force is maintained after the crate begins to move and the coefficient of kinetic friction is 0.16?
a. 1.8 m/s2
c. 3.0 m/s2
b. 1.4 m/s2
d. 2.1 m/s2