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Physics - Rotation Question with Solution | TestHub

PhysicsRotationMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

Two fixed frictionless inclined planes making an angle $30^{o}$ and $60^{o}$ with the vertical are shown in figure two blocks $A$ and $B$ are placed on the two planes. What is the relative acceleration of $A$ with respect to $B$ ?

Options:

Answer:

Solution:

${\vec{a}}_{A} = g \sin 60^{o} \cos 60 \hat{i}$

$= \frac{g \sqrt{3}}{4} \hat{i} - \frac{3 g}{4} \hat{j}$

${\vec{a}}_{B} = g \sin 30 \cos 30 \hat{i} - g \sin^{2} \hat{j}$

$= g \frac{3}{4} \hat{i} - \frac{g \hat{j}}{4}$

${\vec{a}}_{\frac{A}{B}} = {\vec{a}}_{\frac{A}{B}} = {\vec{a}}_{A} - {\vec{a}}_{B}$

$= \frac{- 3 g}{4} \hat{j} + \frac{g}{4} \hat{j}$

$= - 29 \hat{j}$

${\vec{a}}_{\frac{A}{B}} = - 4 .9 \hat{j}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:RotationSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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