Two ice skaters, A and B

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

Two ice skaters, A and B, are at rest on a smooth horizontal rink. Skater A has mass

50\,\text{kg}

and skater B has mass

75\,\text{kg}

. After they push each other apart, skater A moves backward with speed

3\,\text{m/s}

. Calculate the speed of skater B.