Question

Q8) Two bodies have masses in the ratio 5:1 and kinetic energies in the ratio 125:9.
Calculate the ratio of their velocities.
a) 5:3
b) 3:5
c) 1:1
d) 5:1

Answer 1

Answer:

5:3 IS THE ANSWER....

Explanation:

HOPE IT HELPS

Answer 2

Answer:

5:3

Explanation:

1/2×m×v²=Kinetic energy

Now,

1/2×5x×v²=125x

or v²= 125x×2×1/5x

or v²=25×2

or v=sqrt(25×2)

or v=5×2^½

Now for another body,

1/2×m×v²=kinetic energy

1/2×1x×v²=9x

v²=18

v=3×2^½

Now ratio,

velocity of first body:velocity of second body

(5×2^½)/(3×2^½)=5/3

or 5:3

Answer:- 5:3