AP EAMCET · PHYSICS · Work Power Energy
A body of mass \(4 \mathrm{~kg}\) is moving with momentum of \(8 \mathrm{~kg} \mathrm{~ms}^{-1}\). A force of \(0.2 \mathrm{~N}\) acts on it in the direction of motion of the body for 10 seconds. The increase in kinetic energy in joules is
- A \(10\)
- B \(8.5\)
- C \(4.5\)
- D \(4\)
Answer & Solution
Correct Answer
(C) \(4.5\)
Step-by-step Solution
Detailed explanation
\[ \begin{aligned} m & =4 \mathrm{~kg}, p=8 \mathrm{~kg} \mathrm{~m} / \mathrm{s} \\ F & =0.2 \mathrm{~N}, t=10 \mathrm{sec} \end{aligned} \] From Newton's IInd law Force \(=\) rate of change of momentum…
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