Physics - Kinematics Question with Solution | TestHub

PhysicsKinematicsRelativeEasy2 minPYQ_2020

PhysicsEasysingle choice

A ball is projected with a speed of $2 m s^{- 1}$ with respect to a trolley which is moving with $4 m s^{- 1}$ , as shown in the figure. The angle at which ball is projected with respect to the horizontal in ground frame is

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Answer:

Solution:

${\vec{v}}_{b} = {\vec{v}}_{b T} + {\vec{v}}_{T}$

$\tan ϕ = \frac{2 \sin 60^{o}}{4 + 2 \cos 60^{o}} = \frac{\sqrt{3}}{5}$

$\sin ϕ = \sqrt{\frac{3}{28}}$

$ϕ = \sin^{- 1} (\sqrt{\frac{3}{28}})$

Subject:PhysicsTopic:KinematicsSubtopic:Relative

⏱ 2mℹ️ Source: PYQ_2020

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