Question

heavy truck and bike are moving with the same kinetic energy.
the mass of the truck is four time that of the bike, then calculate the
ratio of their momenta. (Ratio of momenta = 1:2)​

Answer 1

Answer:

Explanation:

let the mass of the truck be 4m1 and the mass of the bike be m1

let the velocity of the bike be v1 and the velocity of the truck be v2

KE of the truck = KE of the bike

1/2*4m1*v2^2 = 1/2*m1*v1^2

4m1*v2^2 = m1*v1^2

4*v2^2 = v1^2

therefore v1 = root of 4*v2^2= 2*v2

therefore momentum ratio

m1*2v2 / 4m1*v2

1/2

1:2