Physics - Kinematics Question with Solution | TestHub
PhysicsKinematicsRelativeMedium2 minQB
PhysicsMediumsingle choice
A small object is dropped from the top of a building and falls to the ground, accelerating due to gravity. It passes a window, with speed at the top of the window and speed at the bottom of the window. At what point does it have a speed ? Neglect air resistance.
Options:
Answer:
B
Solution:
With uniform acceleration the mean speed occurs at half the time taken to cross the window. Since the object accelerates, it covers the first half of the window faster, so at half the time it has passed less than half the height: the point is above the centre of the window. Option B.
Stream:JEESubject:PhysicsTopic:KinematicsSubtopic:Relative
⏱ 2mℹ️ Source: QB
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