Question

A car and a truck have masses in the ratio 1:10.Compare their kinetic energies if they have the same linear momentum.

Answer 1

Answer:

hloo mate.....

here's ur answer.....

Let the car have a mass m and move with a velocity V. Let the lorry have a mass M and move with a velocity v. Then,

Momentum of the car = m V,

Momentum of the lorry= M v

Since the two momenta are equal we have,

mV = M v = p ( p is magnitude of momentum)

Kinetic energy of the car = p²/2m,………1

Kinetic energy of the lorry= p²/2M, … ….2

Comparing equations 1 and 2,

Kinetic of the car › Kinetic energy of the lorry ( as the kinetic energy of the vehicle is inversely proportional to the mass of the vehicle. A lighter vehicle has larger kinetic energy. Because to have the same momentum a lighter vehicle needs to travel much faster.

plxzzz mark brainliest......

Answer 2

Answer:

Same as masses

Explanation: