Question

A particle starts from rest with uniform acceleration a, its velocity after n second is u. The displacement of the body in the last two seconds is: ​

Answer 1

Answer:

We know,

At    t=nsec

sn=21an2

v2=2asn       

       =2a⋅21an2       

        =a2n2     

∴v=an

∴a=nv      ...(i)

Now,     sn−sn−2=21a[n2−(n−2)2]               

=21a[4n−4]               

=2a(n−1)              from (i)

sn−s(n−2)=n2v(n−1)

Step-by-step explanation:

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Answer 2

Answer:

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Step-by-step explanation:

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