CBSE Class 11-science Answered
A particle moves along a straight line such that its displacement at any time t is given by 
. Show that the acceleration is constant, and find the velocity of the particle at t=3 s.
. Show that the acceleration is constant, and find the velocity of the particle at t=3 s.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
The displacement at time t,
Instantaneous velocity,
ms-1And instantaneous acceleration,
ms-2So the acceleration is constant.
Then, from the velocity equation,
=-33m/s
=-33m/sHere, negative velocity means that the body is moving towards the origin, that is,
as time advances, displacement decreases.
Answered by | 04 Jun, 2014, 03:23: PM
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