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Same spring is attached with 2kg , 3kg a...

Same spring is attached with `2kg` , `3kg` and `1kg` blocks in three different cases as shown in figure. If `x_(1)` , `x_(2)` and `x_(3)` be the extensions in the spring in these cases then (Assume all the block s to move with uniform acceleration).

A

`x_1=0`,`x_3gtx_2`

B

`x_2gtx_1gtx_3`

C

`x_3gtx_1gtx_2`

D

`x_1gtx_2gtx_3`

Text Solution

Verified by Experts

The correct Answer is:
B
If `m_1` and `m_2` are masses of blocks, then tension T in the string as well as spring is
`T=(2m_1m_2)/(m_1+m_2)g`
`T_1=2g`,`T_2=2.4g` and `T_3=1.33g`
`T_2gtT_1gtT_3`
or `x_2gtx_1gtx_3`
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