If a body moves in such a way that its linear momentum is constant,then
A)its kinetic energy is zero.
B)the sum of all the forces acting on it must be zero.
C)its acceleration is greater than zero and is constant.
D)its center of mass remains at rest.
E)the sum of all the forces acting on the body is constant and nonzero.

Question

Quizplus · Accepted Answer

If a body moves in such a way that its linear momentum is constant, it means that its velocity and mass are constant. Hence, according to Newton's second law, the sum of forces on the body is zero (F=ma, a=0 because velocity is constant).

If a Body Moves in Such a Way That Its