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PhysicsNLMMiscellaneousEasy2 minPYQ_2020
PhysicsEasysingle choice

A 10 kg stone is suspended with a rope of breaking strength 30 kg-wt. The minimum time in which the stone can be raised through a height 10 m starting from rest is
(Taking g = 10 m/s2)

Options:

Answer:
B
Solution:

Maximum tension in the string T = mg

= 30 x 10

= 300 N



T - mg = ma

From the figure

300 - 10 x 10 = 10a

∴ a = 20 m s-2

Thus, the maximum acceleration with which the stone can be raised is 20 m s-2.

Given,     s = 10 m

and         u = 0

∴ 1 0 = 1 2 2 0 t 2

⇒ t = 1 s

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:NLMSubtopic:Miscellaneous
⏱ 2mℹ️ Source: PYQ_2020

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