A puck slides at on frictionless ice toward an identical puck at rest

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Linear Momentum · Linear Momentum

Problem

0.40\,\text{kg}

puck slides at

2.0\,\text{m/s}

on frictionless ice toward an identical puck at rest. The coefficient of restitution for the head-on collision is

e = 0.50

. What percent of the system’s initial kinetic energy is lost during the collision? (a) 25\% (b) 75\% (c) 37.5\% (d) 50\%