Questions
A body starts from rest with uniform acceleration , its velocity after n seconds is . The displacement of the body in last is (assume total time of journey from second)
detailed solution
Correct option is A
v=an⇒a=vnNow, sn=12an2=12vnn2=vn2 and sn-3=12a(n-3)3=12vn(n-3)2∴ Displacement in last 3 s will be,s=sn-sn-3 =v2n-(n-3)2n =6n-9nv2Talk to our academic expert!
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