If a Body Moves in Such a Way That Its

question 25

Multiple Choice

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.

---

Definitions:

Cytoplasm

The gel-like substance inside a cell that surrounds the nucleus and is where most cellular activities occur.

Substantia Nigra

A region of the brain that plays an important role in reward, addiction, and movement; known for its high concentration of dopamine-producing neurons.

Red Nucleus

A structure in the brainstem involved in motor coordination and the control of limb movements.

Globus Pallidus

A subcortical structure of the brain involved in the regulation of voluntary movement.