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In all the given cases block are in cont...


In all the given cases block are in contact and the forces are applied as shown. All the surfaces are smooth. Then in whhich of the following cases, normal reaction between the two blocks is zero.

A

`(i),(iv)`

B

`(ii),(iii)`

C

`(iii)`

D

`(v)`

Text Solution

Verified by Experts

The correct Answer is:
D
`(i)`
`a=0`

`(ii)`
`a=(2F)/(4m)=(F)/(2m)`

`F-N=ma`
`N=F-m((F)/(2m))=(F)/(2)`
`(iii)`

`a=(3F)/(4m)`

`F-N=ma`
`N=F-ma`
`N=F-m((3F)/(4m))`
`N=(F)/(4)`.
`(iv)`
`a=(3F)/(4m)`

`2F-N=ma, N=2F-m((3F)/(4m))`
`N=(5F)/(4)`
`(v)`
`a=(3F)/(3m)=(F)/(m)`

`N+F=ma , N+F=m((F)/(m))`
`N=0`
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