Question

A ball is having speed 'v0' moves in a straight line under the influence of a constant acceleration 'a' .Then its final speed after travelling a distance 'x' for time 't' will be
A) x/t- vO
B) v0+2ax
C) v0+1/2at^2
D) (2x/t)-v0

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Answer 1

D) (2x/t) - v0 .... answer...

v = v0 + at .... (1)

x = v0t + 1/2 a t^2

=> x/t = v0 + 1/2 at

=> at = 2 ( x/t - v0 ) ......(2)

from eqn (1)&(2)...

v = v0 + 2 (x/t - v0)

= (2x/t) - v0 ....... ....... ans...