Question

8. Two bodies of equal masses move with uniform velocities v and 3 v, respectively. Find the ratio of their kinetic energies.​

Answer 1

Answer:

1:9

Explanation:

Mass of both bodies are same = m

K.E = 1/2mv²

K.E. of first body = 1/2mv²

K.E. of 2nd body = 1/2m(3v)² = 1/2m 9v² = 9/2mv2

Ratio of their kinetic energies = 1/2mv²÷9/2mv²

= 1/9 =1:9

Answer 2

Answer:

ratio of their kinetic energy is 1:9

Explanation:

Kinetic energy = 1/2 mv²

ratio of kinetic energy = 1/2 mv² / 1/2 9 mv²

KE1 : KE2 = 1:9