One end of massless rope, which passes over a massless and frictionles

1.	One end of massless rope, which passes over a massless and frictionless pulley P is tied to a hook C while the other end is free. Maximum tension that the rope can bear is 360N. With what value of minimum safe acceleration (in ms2) can a man of 60kg climb down the rope? (1) 16 (2) 6 (3) 4 (4) 8
Answer» The correct answer is (3) 4. Explanation: If monkey move downward with acceleration a then its apparent weight decreases. In that condition Tension in string =m(g−a) This should not be exceed over breaking strength of the rope i.e. 360≥m(g−a) =>360≥60(10−a) => a≥ 4 m/s²

One end of massless rope, which passes over a massless and frictionless pulley P is tied to a hook C while the other end is free. Maximum tension that the rope can bear is 360N. With what value of minimum safe acceleration (in ms2) can a man of 60kg climb down the rope? (1) 16 (2) 6 (3) 4 (4) 8

Answer»

The correct answer is (3) 4.

Explanation:

If monkey move downward with acceleration a then its apparent weight decreases. In that condition Tension in string =m(g−a) This should not be exceed over breaking strength of the rope i.e. 360≥m(g−a)

=>360≥60(10−a)

=> a≥ 4 m/s²

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One end of massless rope, which passes over a massless and frictionless pulley P is tied to a hook C while the other end is free. Maximum tension that the rope can bear is 360N. With what value of minimum safe acceleration (in ms2) can a man of 60kg climb down the rope? (1) 16 (2) 6 (3) 4 (4) 8

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One end of massless rope, which passes over a massless and frictionless pulley P is tied to a hook C while the other end is free. Maximum tension that the rope can bear is 360N. With what value of minimum safe acceleration (in ms2) can a man of 60kg climb down the rope? (1) 16 (2) 6 (3) 4 (4) 8