In the figure the block of mass M is at rest on the floor. The acceleration with which a monkey of mass m should climb up along the rope of negligible mass so as to lift the block from the floor is,
A
B
C
D
> 
Text Solution
Verified by ExpertsThe correct answer is:
B
Equation of motion for M:
Since M is stationary,
T – Mg = 0
⇒ ⇒ T = Mg … (1)
Since the monkey moves up with an acceleration ‘a’,
T – mg = ma
⇒ ⇒ T = m(g+a) … (2) Equating (1) and (2), we obtain
Mg = m(g+a)
⇒ ⇒ a = 
That means, if a > 
, the block M can
be lifted from floor,
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