CBSE Class 10 Answered
A ball of mass 0.5 kg slows down from a speed of 5 m/s to 3 m/s.Calculate the change of kinetic energy of the ball?
Asked by nishasaumitya | 03 Nov, 2018, 01:50: PM
Expert Answer
Change in Kinetic Energy = .....................(1)
where m is mass of ball, vf is final speed and vi is initial speed.
we have vf = 3 m/s and vi = 5 m/s
Change in Kinetic Energy = (1/2)×0.5×(32 - 52) = -4 J
hence Kinetic energy decreases by 4 J
Answered by Thiyagarajan K | 03 Nov, 2018, 10:00: PM
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