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Physics - W.E.P. Question with Solution | TestHub

PhysicsW.E.P.MiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A simple pendulum is released from $A$ as shown. If $m$ and $l$ represent the mass of the bob and length of the pendulum, the gain in kinetic energy at $B$ is

Options:

Answer:

Solution:

Applying principle of conservation of enegy,

$∆ K + ∆ U = 0; (K - 0) + (- m g h) = 0$

$K = m g h = m gl \cos (30^{°})$

$∴ K = mg l \cos 30 ° = \frac{\sqrt{3}}{2} mg l$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:W.E.P.Subtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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