Please help - Gravity v/& Acceleration


by AlisonArulia
Tags: acceleration, gravity, v or and
AlisonArulia
AlisonArulia is offline
#1
Oct23-09, 08:27 AM
P: 17
Hi everyone,

I hope you can help me with this as I am having a problem sorting all this out.

I have been told that Gravity and acceration are the same thing. It was explained to me by thinking about droping a ball in a lift (that was is space so no gravity) and the ball would act as if it was being pulled to the floor by gravity.

OK, I sort of understand this.

But I was also told that if a swing a stone on a string around y head, then the stone is affected by gravity towards the centre of the spining. ie. towards me. But I can't be producing gravity, so what is happening please.

Thank you for any help you can give me.

Alison
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A.T.
A.T. is offline
#2
Oct23-09, 08:40 AM
P: 3,543
Quote Quote by AlisonArulia View Post
I have been told that Gravity and acceration are the same thing.
Not really the same thing. Accelerated frames are equivalent to frames at rest in a gravitational field.
Quote Quote by AlisonArulia View Post
But I was also told that if a swing a stone on a string around y head, then the stone is affected by gravity towards the centre of the spining. ie. towards me. But I can't be producing gravity, so what is happening please.
You are producing "artificial" gravity. For someone living in the stone it would the same as being at rest on the surface of a planet.
AlisonArulia
AlisonArulia is offline
#3
Oct23-09, 08:46 AM
P: 17
oooooo. I get it now.
Thank you so much.


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