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Grade 129 grade science

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.

Profile image of Pawan Prajapati
5 Years agoGrade 12
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1 Answer

Profile image of Harshit Singh
5 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