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SAT® Subject Test in Physics

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Man and Boy on Ice

SATPHY-TYCAXU

A large, massive man and a small boy of small mass are held far apart on an icy surface where friction is negligible. The man and the boy hold opposite ends of a bungee cord that is stretched.

When the boy and the man are released, they are each pulled by the bungee cord so that they approach one another.

When they get close to each other, how will their momenta, velocity, and kinetic energies compare?

A
Magnitude of Momenta Magnitude of Velocity Kinetic Energy
man's greater than boy's boy's greater than man's man's greater than boy's
B
Magnitude of Momenta Magnitude of Velocity Kinetic Energy
same for both boy's greater than man's same for both
C
Magnitude of Momenta Magnitude of Velocity Kinetic Energy
same for both same for both same for both
D
Magnitude of Momenta Magnitude of Velocity Kinetic Energy
boy's greater than man's boy's greater than man's same for both
E
Magnitude of Momenta Magnitude of Velocity Kinetic Energy
same for both boy's greater than man's boy's greater than man's