According to Newton's laws, a force must be acting whenever
A) an object moves with some speed.
B) the direction of an object's motion changes.
C) time passes.
D) an object's position changes.

Question

Quizplus · Accepted Answer

Newton's laws of motion, particularly the first law (also known as the law of inertia), state that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. Therefore, a change in the direction of an object's motion implies the action of a force. Choices A, C, and D do not necessarily require a force to be acting according to Newton's laws, as an object can move at a constant velocity or change position without an external force if it is already in motion.

According to Newton's Laws, a Force Must Be Acting Whenever