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Physics - Kinematics Question with Solution | TestHub

PhysicsKinematics1-DMedium2 minQB

PhysicsMediumsingle choice

When the speed of a car is $u$ , the minimum distance over which it can be stopped is $d$ . If the speed becomes $3 u$ with the same stopping time, the minimum stopping distance becomes:

Options:

Answer:

Solution:

Same stopping time means the retardation triples; from $u^{2} = 2 a d$ and $9 u^{2} = 2 (3 a) d^{'}$ , dividing gives $d^{'} = 3 d$ . Option B.

Stream:JEESubject:PhysicsTopic:KinematicsSubtopic:1-D

⏱ 2mℹ️ Source: QB

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