AP EAMCET · PHYSICS · Work Power Energy
A toy of mass \(20 \mathrm{~g}\) at rest acquires a velocity \((3 \hat{\mathrm{i}}-2 \hat{\mathrm{j}}) \mathrm{ms}^{-1}\) in 2 seconds. Then the power of the toy is
- A \(0.975 \mathrm{~W}\)
- B \(0.325 \mathrm{~W}\)
- C \(1.3 \mathrm{~W}\)
- D \(0.065 \mathrm{~W}\)
Answer & Solution
Correct Answer
(C) \(1.3 \mathrm{~W}\)
Step-by-step Solution
Detailed explanation
Mass of toy, \(\mathrm{m}=20 \mathrm{~g}=0.02 \mathrm{~kg}\) Velocity, \(\overrightarrow{\mathrm{v}}=(3 \hat{\mathrm{i}}-2 \hat{\mathrm{j}}) \mathrm{m} / \mathrm{s}\) \[ |\overrightarrow{\mathrm{v}}|=\sqrt{9+4}=\sqrt{13} \mathrm{~m} / \mathrm{s} \] Power of the toy is defined by…
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