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Q.

Which would have a greater effect on the kinetic energy of an object, doubling the mass of an object or doubling its velocity?


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a

Doubling the mass

b

Doubling the weight

c

Doubling its speed

d

Doubling its velocity 

answer is D.

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Detailed Solution

This is because kinetic energy depends on the velocity of the object squared. Therefore when the velocity of an object doubles then the kinetic energy of the body becomes 4 times. Hence, the kinetic energy is equal to half mass multiplied by velocity squared. So, kinetic energy of an object has a greater effect when the velocity is doubled.
 
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