You whirl a stone in a horizontal circle in such a way that the stone is in unif

Question

You whirl a stone in a horizontal circle in such a way that the stone is in uniform circular motion. Which of the following is true for this situation? Select all that apply.

a)The magnitude of the stone's velocity does not change.
b)The stone is moving with constant velocity.
c)The stone's speed is constant.
d)The direction of the stone's velocity changes as it moves around the circle.
e) The change in direction of the stone's motion is due to the centripetal force acting on the stone.

I think that all are true except e, because I don't see the distinction between a-c. What's true for this situation?

Explanation / Answer

All of the answers are correct except for b. A.) Yes, The magnitude is the speed not the direction in this case since it is uniform circular motion. B.) No because the constant velocity means same speed and direction, and in this case it is always changing, seeing how it is always tangent to its position. C.) Yes, the stone speed doesn't change or deviate because it is in uniform circular motion. D.) Yes, the direction of the velocity is changing over time seeing as the direction is tangential velocity. E.) Yes, the centripetal force is acting towards the center of the circle therefore the stone has a force acting inward which is changing the direction of the motion. If it wasn't present, the stone would fly straight and not continue in its circular pattern.

Related Questions

Navigate

• Browse (All)
• Browse Y
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.