In the system shown in the figure, the block is pulled by applying a force of 40 N on the other end of the string. If the kinetic energy of the block increases by 40 J in a given interval of time then work done by tension on the block is g = 10 m s - 2

Question

In the system shown in the figure, the block is pulled by applying a force of 40 N on the other end of the string. If the kinetic energy of the block increases by 40 J in a given interval of time then work done by tension on the block is g = 10 m s - 2, 40 J, 80 J, Zero, 20 J

MARKS App · Accepted Answer

Work done on block = ∆ K E W = 40 J Net force on the block is = T - M Thus W = F n e t × S 40 = 20 × S ⇒ S = 2 m Work done by tension = T × S cos ⁡ 0 o ⇒ 40 2 1 = 80 J

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