First slide
Instantaneous velocity
Question

Velocity of a body moving along a straight line with uniform acceleration (a) reduces by  34 of its initial velocity in time to . The total time of motion of the body till its velocity becomes zero is

Easy
Solution

u3u4=uat0a=3u4t0 (or) ua=43t0
Now, 0 = u – at (or)  t=ua=43to

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