A block Mass Starting incline | SurfaceChemistryJEE-Main2023

JEE MAIN 2023

11-4-2023

Question

A block of mass 5 kg starting from rest pulled up on a smooth incline plane making an angle of $30^{\circ}$ with horizontal with an affective acceleration of $1 \mathrm{~ms}^{-2}$. The power delivered by the pulling force at $\mathrm{t}=10 \mathrm{~s}$ from the start is $\_\_\_\_$ W. [Use $\mathrm{g}=10 \mathrm{~ms}^{-2}$ ] (calculate the nearest integer value)

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Solution

Sol. $$ \begin{aligned} & F-5 g \sin 30^{\circ}=5 a \Rightarrow F=5+25=30 \mathrm{~N} \\ & V_{10}=u+a t \Rightarrow v_{10}=0+1(10)=10 \mathrm{~m} / \mathrm{s} \\ & P_{10}=F v=300 \mathrm{~W} \end{aligned} $$

Question Tags

JEE Main

Chemistry

Medium

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