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A semi circular disc of radius R is plac...

A semi circular disc of radius `R` is placed on a smooth horizontal surface. Figure shows top view of this. If temperature is increased by `Deltat` then displacement of (coefficient of linear expansion is `alpha`):

A

`B` along `x`-axis is `RalphaDeltat`

B

`B` along `y`-axis is zero

C

`A` along `y`-axis is`RalphaDeltat`

D

`A` along `x`- axis is `-(4R)/(3pi)alphaDeltat`

Text Solution

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The correct Answer is:
B, C, D
Displacement of centre of mass is zero. So take centre of mass as origin then find displacement of all points.
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