- #1

Darshit Sharma

- 93

- 11

- Homework Statement
- Centripetal acceleration in uniform circular motion is uniform or non-uniform?

Which kind of force acts on the hand and its direction?

- Relevant Equations
- No equations

I had an exam ques which was as follows:

The first part is clear to me.....it is uniform (or constant) speed.

I am in doubt on the account of the second part as the answer key says this:

So the overall question concerning the second part is as follows:

We know that the direction of centripetal acceleration is ever-changing and since acceleration is a vector quantity we must conclude that the acceleration is non-uniform but the answer keys says the contrary.

Please don't give answers which are vague in this context like "It is uniform in magnitude but not non-uniform in direction." I truly understand it may be the case which is true but what I am seeing here is the answer to this question which has just Yes No option.

Now for the third part,

I believe that centrifugal force should not be the answer because centrifugal force acts on the body undergoing the circular motion, hence it should be the stone on which both centripetal and centrifugal forces are acting.

So does anyone have any clue about which force could be acting on the hand and its direction?

Another source (my textbook) says:

"Reaction of tension away from the centre of the circular path"

But isn't this same ass the centrifugal force? Doesn't all this contradict "centrifugal force acts on the body undergoing the circular motion"? And if not, then which force provides for the centrifugal force?

The first part is clear to me.....it is uniform (or constant) speed.

I am in doubt on the account of the second part as the answer key says this:

So the overall question concerning the second part is as follows:

We know that the direction of centripetal acceleration is ever-changing and since acceleration is a vector quantity we must conclude that the acceleration is non-uniform but the answer keys says the contrary.

Please don't give answers which are vague in this context like "It is uniform in magnitude but not non-uniform in direction." I truly understand it may be the case which is true but what I am seeing here is the answer to this question which has just Yes No option.

Now for the third part,

I believe that centrifugal force should not be the answer because centrifugal force acts on the body undergoing the circular motion, hence it should be the stone on which both centripetal and centrifugal forces are acting.

So does anyone have any clue about which force could be acting on the hand and its direction?

Another source (my textbook) says:

"Reaction of tension away from the centre of the circular path"

But isn't this same ass the centrifugal force? Doesn't all this contradict "centrifugal force acts on the body undergoing the circular motion"? And if not, then which force provides for the centrifugal force?