Question

Two toy cars having masses 200kg and 2kg are
moving with the same speed of 15m/sec. Find ratio of their kinetic energy​

Answer 1

Answer:

Ratio of Kinetic Energy = 100 : 1

Explanation:

For the first car,

Mass = m = 200kg

Velocity = v = 15m/s

Kinetic energy = 1/2 mv²

KE = 1/2 × 200 × 15

     = 1500 J

For the secon car,

Mass = m = 2kg

Velocity = v = 15m/s

Kinetic energy = 1/2 mv²

KE = 1/2 × 2 × 15

     = 15 J

Therefore, ratio of KE = 1500 : 15

Ratio of KE = 100 : 1