A monkey of mass m kg slides down a light rope attached to a fixed spring balance, with an acceleration a. The reading of the spring balance is W kg. [g = acceleration due to gravity]
(a) The force of friction exerted by the rope on the monkey is m(g - a) N.
(b) m = Wg / g - a
(c) m = W ( 1+ a/g)
(d) The tension in the rope is Wg N.
