- #1

- 157

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(angular acceleration x radius)= Acceleration of center of mass ?

But a rotating body can have angular acc. even if it is not translating. what is wrong?

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- Thread starter AakashPandita
- Start date

- #1

- 157

- 0

(angular acceleration x radius)= Acceleration of center of mass ?

But a rotating body can have angular acc. even if it is not translating. what is wrong?

- #2

- 91

- 3

- #3

- 91

- 3

the point is moving around the body with a speed= R x α

where α= angular acceleration

where α= angular acceleration

- #4

- 1,540

- 135

The correct relationship for a point on a rotating body is

a

α = angular acceleration of the rotating body

r= distance between the point and the center of the axis

(angular acceleration x radius)= Acceleration of center of mass ?

But a rotating body can have angular acc. even if it is not translating. what is wrong?

The relationship a

For eg. a sphere rolling without slipping on floor .

- #5

- 91

- 3

Hi Aakash...

The correct relationship for a point on a rotating body is

awhere ,_{tan}= αr

a_{tan}=tangential acceleration of the point with respect to center of the axis

α = angular acceleration of the rotating body

r= distance between the point and the center of the axis

The relationship a_{cm}= αr is a constraint which is sometimes obtained in cases when a body is rotating as well as translating.

For eg. a sphere rolling without slipping on floor .

i have told the same........

- #6

- 1,540

- 135

i have told the same........

Your language is sloppy and inaccurate .

The item in red should be acceleration.

Again ,instead of center of mass,you should have used center of rotation.

the point is moving around the body with a speed= R x α

where α= angular acceleration

That doesn't make any sense . Neither the point is moving around the body ,nor is speed equal to R x α

- #7

- 157

- 0

thanks.

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