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Two blocks are connected by a string as ...

Two blocks are connected by a string as shown in the diagram. The upper block is hung by another string. A force F applied on the upper string produces an acceleration of `2 m//s^(2)` in the upward direction in both the blocks. If T and T be the tension in the two parts of the string , then `(g = 9.8 m//s^(2))`

A

T = 70 8. N and T′ = 47 2. N

B

T = 58.8N and T′ = 47 2. N

C

T = 70 8. N and T′ = 58.8N

D

T = 70 8. N and T′ = 0

Text Solution

Verified by Experts

The correct Answer is:
A
`a = 2m//s^(2)`
`T - 4g = 4a rArr T = 4 (9.8+2) = 47.2 N`
`T - T(+ 2g) = 2a`
`rArr T = 47.2 + 2 xx 2 + 2 xx 9.8`
` = 70.8 N`
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