# Chapter 5: Circular Motion; Gravitation

4 Questions | Total Attempts: 748  Settings  • 1.
Is it possible for an object moving with a constant speed to accelerate? Explain.
• A.

No, if the speed is constant then the acceleration is equal to zero.

• B.

No, an object can accelerate only if there is a net force acting on it.

• C.

Yes, although the speed is constant, the direction of the velocity can be changing.

• D.

Yes, if an object is moving it can experience acceleration.

• 2.
Consider a particle moving with constant speed such that its acceleration of constant magnitude is always perpendicular to its velocity.
• A.

It is moving in a straight line.

• B.

It is moving in a circle.

• C.

It is moving in a parabola.

• D.

None of the above is definitely true all of the time.

• 3.
An object moves in a circular path at a constant speed. Compare the direction of the object's velocity and acceleration vectors.
• A.

Both vectors point in the same direction.

• B.

The vectors point in opposite directions.

• C.

The vectors are perpendicular.

• D.

The question is meaningless, since the acceleration is zero.

• 4.
When an object experiences uniform circular motion, the direction of the acceleration is
• A.

In the same direction as the velocity vector.

• B.

In the opposite direction of the velocity vector.

• C.

Is directed toward the center of the circular path.

• D.

Is directed away from the center of the circular path.

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