Hint A communication satellite orbits so that it is always in the same location in the sky. Back to Ch. 4 questions. Hint Recall that momentum is the product of an object's mass and its velocity . Momentum incorporates the concept of inertia and velocity. You can think of an object's momentum as a measure of the effort required to stop it.
Momentum is like velocity.
It is a vector. The direction of the momentum is important. Back to Ch. 5 questions. Back to Ch. 5 questions. To change an object's momentum, you must apply a force.