Question

5. Á bike of mass 100 kg and a car of mass
500 kg are moving at the same speed. Find
the ratio of their kinetic energies.​

Answer 1

Explanation:

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We know that kinetic energy is given as E = (1/2)mv2

In case of Bike

E1 = (1/2)mv2 

= 1/2 × 100 × v2 

and,

In case of Car

E2 = 1/2 × 500 ×v2

Ratio will beE1/E2 = [1/2 × 100 × v2] / [1/2 × 500 × v2]E1/E2 =

1/5

Ratio is 1:5