Question

A 5 kg body and a 10 kg body have equal momenta. If the kinetic energy of the 5 kg body is 10 J, then the kinetic energy of 10 kg body is
(A) 15 J
(B) 10 J
(C) 5J
(D) 2.5J​

Answer 1

Answer:

5J

Explanation:

5*V1=10*V2

V1=2V2

1/2*(5)*(V1^2)=10

V1=2 m/s

hence V2=1m/s

Kinetic energy of 10 Kg = 1/2*(10)*(1^2)

= 5J