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PhysicsNLMFBD & EquilibriumEasy2 minPYQ_2020

PhysicsEasysingle choice

If A block is dragged on a smooth horizontal plane with the help of a light rope which moves with a velocity $v$ as given in the figure. Then find The horizontal velocity of the block .

Options:

Answer:

Solution:

From geometry $l^{2} = x^{2} + y^{2}$ but $y$ is constant, hence differentiating, we have, $2 l \frac{d l}{d t} = 2 x \frac{d x}{d t}$

But $\frac{d l}{d t} = v$ . Hence horizontal velocity of block,

$v_{x} = \frac{d x}{d t}$

$\Rightarrow l v = x . v_{x}$ or $v_{x} = \frac{l . v}{x} = \frac{v}{\sin θ}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:NLMSubtopic:FBD & Equilibrium

⏱ 2mℹ️ Source: PYQ_2020

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