1.

a body starts from rest with uniform acceleration. If its velovity after n second is v, then its displacement in the last two seconds is​

Answer»

Answer:

Initial velocity of body u=0

Let the ACCELERATION be a.

Using v=u+at

We get v=0+an

⟹ a=

n

v

For DISPLACEMENT in LAST two SECONDS, t=2

Using S=vt−

2

at

2

Or S=v(2)−

2n

v

(2)

2

=

n

2v(n−1)


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