The expression used for momentum,p = mv,
A) Is a good low-velocity approximation
B) Is a good high-velocity approximation
C) Is correct as long as we properly understand v
D) Always gives too high a value for p

Question

Quizplus · Accepted Answer

The expression p=mv is a good approximation at low velocities, where relativistic effects are negligible. At high velocities, close to the speed of light, relativistic momentum must be used.

The Expression Used for Momentum,p = Mv