Chapter 5: Circular Motion; Gravitation
- 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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