Question

A mass (m) is lowered with the help of a
string by a distance (d) at a constant accel-
eration g/4 then The work done by the string is​

Answer 1

SOLUTION.

As we see that the mass is moving with acceleration less than gravity hence there is some force acting on the upward direction which is Tension (T).

Mass of the body = m

Tension = T

Acceleration = g/4

ACC to NLM

mg - T = mg/4

T = mg - mg/4

T = 3mg/4

Work done by string = ( Force exerted by the string × displacement of the body)

Work = (3mg/4)(-x)

Negative sign indicates that body is moving in opposite direction to that of force i.e Tension

Work = -3mgx/4

#answerwithquality

#BAL

Answer 2

Explanation:

mass is moving with acceleration..i don't know much about physics

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