COMEDK Exam 2019 Solved Paper

Let m1 be the mass of 1 st body,m1=1‌kg m2 be the mass of 2 nd body, m2=2‌kg
The relation, between kinetic energy and momentum is given by
K=‌

1

2

mv2=‌

p2

2m

where, p is the momentum of the body. Since, momentum of both bodies are same.
Hence, ‌

k1

k2

=‌

p2

2m1

×‌

2m2

p2

‌

k1

k2

=‌

2

1

Thus, the ratio of their kinetic energies is 2:1.