CBSE Class 9 Answered
If the kinetic energy of a body is increased by 4% the momentum:
(1)increases by 2% (2)increases by 4%
(3)increases by 8% (4)increases by 16%
Asked by ramanantra26 | 12 Sep, 2019, 23:51: PM
Expert Answer
Let Kc be the change in kinetic energy, Ki be the initial kinetic energy, pc be the change in the momentum when kinetic energy is increased by 4% and p be the initial momentum.
When the kinetic energy increases by 4%,
Kc = Ki + 4% Ki
→Kc = Ki + 0.04 Ki
→Kc = 1.04 Ki
Now, we know that
Now,
Thus, change in the momentum will be 1.9 %
Answered by Shiwani Sawant | 13 Sep, 2019, 11:04: AM
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