Physics

Problem

Two ice skaters are initially at rest on frictionless ice. Skater X has a mass of

50\,\text{kg}

, and skater Y has a mass of

70\,\text{kg}

. Skater X pushes horizontally on skater Y with a constant force of

100\,\text{N}

for

0.40\,\text{s}

. What is the magnitude of the force exerted on skater X during the push? a)

71\,\text{N}

50\,\text{N}

100\,\text{N}

140\,\text{N}