Chapter 6, Problem 12PCE

Predict/Calculate Force Times Distance At the local hockey rink, a puck with a mass of 0.12 kg is given an initial speed of v = 5.3 m/s. (a) If the coefficient of kinetic friction between the ice and the puck is 0.11, what distance d does the puck slide before coming to rest? (b) If the mass of the puck is doubled, does the frictional force F exerted on the puck increase, decrease, or stay the same? Explain. (c) Does the stopping distance of the puck increase, decrease, or stay the same when its mass is doubled? Explain. (d) For the situation considered in part (a), show that $Fd=\frac{1}{2}m{v}^2$. (In Chapter 7 we will see $\frac{1}{2}m{v}^2$ is the kinetic energy of an object.)