WBJEE · Physics · Work Power Energy
A particle is acted upon by a constant power. Then, which of the following physical quantity remains constant?
- A Speed
- B Rate of change of acceleration
- C Kinetic energy
- D Rate of change of kinetic energy
Answer & Solution
Correct Answer
(D) Rate of change of kinetic energy
Step-by-step Solution
Detailed explanation
We have Power \(=\) Rate of doing work \(=\frac{d W}{d t}\) or, \(\quad P=\frac{d W}{d t}=\) rate of change in \(\mathrm{KE}\) i.e., \(\quad P=\frac{d W}{d t}=\frac{d(\mathrm{KE})}{d t}=\) constant
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