Physics

Problem

Puck A (

0.20\,\text{kg}

) slides on ice at

3.0\,\text{m/s}

toward stationary puck B (

0.30\,\text{kg}

). They undergo a one-dimensional elastic collision. Immediately afterward, puck B collides and sticks to stationary puck C (

0.50\,\text{kg}

). What percentage of puck B’s kinetic energy just before the second collision is lost during that perfectly inelastic collision? a)

38\%

67\%

63\%

84\%