Student A ( ) stands from a vertical axis on frictionless ice facing Student B ( )…

PHYSICS · Subjective · AP · Physics 1: Algebra-based · Energy and Momentum of Rotating Systems · Energy and Momentum of Rotating Systems

Problem

Student A (

65\,\text{kg}

) stands

1.60\,\text{m}

from a vertical axis on frictionless ice facing Student B (

50\,\text{kg}

) who is

1.20\,\text{m}

from the same axis. Starting from rest, they push tangentially against each other with an average force of

40\,\text{N}

for

1.5\,\text{s}

. Ignore all external torques. Calculate the magnitude of the angular speed of Student A immediately after they separate.