A 35-kg girl is standing near and to the left of a 43-kg boy on the frictionless surface of a frozen pond. The boy throws a 0.75-kg ice ball to the girl with a horizontal speed of 6.2 m/s. What are the velocities of the boy and the girl immediately after the girl catches the ice ball? girl boy
A)0.81 m/s, left 0.67 m/s, right
B)0.17 m/s, left 0.14 m/s, left
C)0.18 m/s, right 0.13 m/s, left
D)0.42 m/s, left 0.49 m/s, right
E)0.13 m/s, left 0.11 m/s, right

Question

Quizplus · Accepted Answer

The conservation of momentum principle applies. The initial momentum is zero, so the final momentum must also be zero. The boy's velocity is calculated using the momentum of the ice ball, and the girl's velocity is calculated using the combined mass of the girl and the ice ball.

A 35-Kg Girl Is Standing near and to the Left