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The kinetic energy of an object of mass, m moving with a velocity of 5 ms 1 is 25 What will be its kinetic energy when its velocity is doubled? What will be its kine energy when its velocity is increased three times.

The kinetic energy of an object of mass, m moving with a velocity of 5 ms 1 is 25 What will be its kinetic energy when its velocity is doubled? What will be its kine energy when its velocity is increased three times.

Grade:12

1 Answers

Harshit Singh
askIITians Faculty 5963 Points
3 years ago
Dear Student

K.E. = 25J
V=5m/s
K.E. = ½mv^2
25 = ½m (5)^2
m = 2 k g
(i) = If velocity is double = 10m/s
m = 2kg
K.E. = ½mv^2
= ½(2) . (10)^2
= 100J
(ii) If velocity is 3 times v=15m/s
m= 2kg
K.E. = ½mv^2
=½(2) . (15)^2
= 225 J

Thanks

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