In the figure a smooth pulley of negligible weight is suspended by a spring balance. Weights of 1kg and 5 kg are attached to the opposite ends of a string passing over the pulley and move with acceleration because of gravity. During the motion, the spring balance reads a weight of `:`

Options

A. 6 kgf
B. ess than 6 kgf
C. More than 6 kgf
D. May be more or less than 6 kgf

Answer

B

Explanation

Spring balance reading is equal to 27 tension in the string
`= ( 2m _(1) m _(2))/( m _(1) + m _(2)) = ( 2 xx 5 xx 1)/(6) = (5)/(3) K g f`
reading of spring balance=
`2 T = 2 xx (5)/(3) = (10)/(3) Kgf`