An object is moving forward with a constant velocity.Which statement about this object MUST be true?
A) The net force on the object is zero.
B) The net force on the object is in the forward direction.
C) No forces are acting on the object.
D) The acceleration of the object is in the forward direction.

Question

Quizplus · Accepted Answer

If an object is moving with constant velocity, it means that its speed and direction are not changing. Since acceleration is defined as a change in velocity (either in speed or direction), the object must have zero acceleration. According to Newton's second law, the net force on an object is equal to its mass times its acceleration. Therefore, if the object has zero acceleration, it must also have zero net force acting on it. Therefore, the correct statement is that the net force on the object is zero (choice A).

An Object Is Moving Forward with a Constant Velocity