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Physics - Kinematics Question with Solution | TestHub

PhysicsKinematics1-DMedium2 minQB

PhysicsMediumsingle choice

A particle is moving in a straight line with initial velocity $u$ and uniform acceleration $f$ . If the sum of the distances travelled in the $t$ th and $(t + 1)$ th seconds is $100$ cm, then its velocity after $t$ seconds, in cm/s, is:

Options:

Answer:

Solution:

$s_{t} + s_{t + 1} = [u + \frac{f}{2} (2 t - 1)] + [u + \frac{f}{2} (2 t + 1)] = 2 u + 2 f t = 100$ , so $u + f t = 50$ cm/s, which is exactly the velocity after $t$ seconds. Option C.

Stream:JEESubject:PhysicsTopic:KinematicsSubtopic:1-D

⏱ 2mℹ️ Source: QB

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