You are watching a hockey game on your digital video recorder. Your team's goalie is at rest when he catches a \(0.16 \mathrm{~kg}\) puck moving straight toward him. The announcer says it was a \(40-\mathrm{m} / \mathrm{s}\) slap shot, based on radar gun data. Normally the goalie would be braced, but in this case he is resting on parallel skate blades so that there is negligible friction to impede his subsequent motion. The collision is too fast to observe quantitatively, but by running the video in slow motion, you can tell that the goalie's glove is \(150 \mathrm{~mm}\) from his body when the puck strikes and is right against his chest after the successful catch. It is also clear that the stunned goalie (holding the puck) drifts backward at \(71 \mathrm{~mm} / \mathrm{s}\) for a second or two after the collision is over.

(a) Compute the average acceleration of the puck and of the goalie during the collision.

(b) Determine the inertia of the goalie (including his equipment).

(c) How much kinetic energy is converted to thermal energy in the glove? Check your answers by solving in two ways when possible.