Question

130
21 20 52
3) 30 J3
4) 10/10
3.) A man has twice the mass of a boy and has half the kinetic energy of the
boy. The ratio of the speeds of the man and the boy must be
1) 2:1
2) 4:1
3) 1:4
4) 1:2
JEE ADVANCED​

Answer 1

Explanation:

Let the mass of boy be "m"

Mass of man = 2m

KE energy of man = mv^2

KE energy of boy = 2mv^2

On comparing both sides

Man : Boy = v^2 : 2v^2

= 1 : 2

Do mark as Brainliest as it is my first Jee Advanced question sol.

Answer 2

Explanation:

Let the mass of boy be "m"

Mass of man = 2m

KE energy of man = mv^2

KE energy of boy = 2mv^2

On comparing both sides

Man : Boy = v^2 : 2v^2

= 1 : 2

Do mark as Brainliest as it is my first Jee Advanced question sol.