Question

two bodies of equal masses are moving with uniform velocity v and 2v find the ratio of their Kinetic energies

Answer 1

m1=m2=m(let be)

V1=v
V2=2v

k1=1/2mv²...............................(1)

k2=1/2m(2v)2

k2=1/2× 4mv².........................(2)

by equation (1) &(2)

k1/k2= 1/2mv²÷1/2 ×4mv²

k1/k2=v²/4v²

k1/k2= 1/4

it is ratio of kinetic energy



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