Question

 A car is moving with a speed of 15 km per hour and another identical car is moving with a speed of 40 km per hour. Find the ratio of their kinetic energy​

Answer 1

Answer:

Ratio of their Kinetic energies =1:4

Explanation:

Since we know that the K.E of a body =  

Velocity of first car is 15 km per hour=4.167 m/s.

So,kinetic energy of first car is

Velocity of Second car is 30 km per hour=8.34 m/s.

So,kinetic energy of Second car is

Ratio of their Kinetic energies=

Ratio of their Kinetic energies =1:4

Explanation: