Question

. Two objects moving with velocities 20m/s and 40m/s have equal momentum. What is the ratio of their kinetic energies? *

Answer 1

Given

V

1

=20m/s and V

2

=40m/s

M

2

=8 kg

K.E

1

=K.E

2

2

1

M

1

V

1

2

=

2

1

M

2

V

2

2

⟹M

1

=M

2

×

V

1

2

V

2

2

=8×

20

2

40

2

=32 kg