Two toy-cars A and B of masses 200 g and 500 g respectively are moving with the same speed. Which of the two has greater kinetic energy ?

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Solution

Kinetic energy = 0.5mv²

For same speed
Kinetic energy ∝ Mass

∴ Massive object (500 g) will have greater kinetic energy.

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Two toy-cars A and B of masses 200 g and 500 g respectively are moving with the same speed. Which of the two has greater kinetic energy ?

Kinetic energy = 0.5mv² For same speed Kinetic energy ∝ Mass ∴ Massive object (500 g) will have greater kinetic energy.

Kinetic energy = 0.5mv²

For same speed
Kinetic energy ∝ Mass

∴ Massive object (500 g) will have greater kinetic energy.