AP EAMCET · PHYSICS · Work Power Energy
A body of mass \(2 \mathrm{~kg}\) is moving with a constant acceleration of \((2 \hat{i}+3 \hat{j}-\hat{k}) \mathrm{ms}^{-2}\). If the displacement made by the body is \((3 \hat{i}-\hat{j}+2 \hat{k}) \mathrm{m}\) then the work done is
- A \(22 \mathrm{~J}\)
- B \(2 \mathrm{~J}\)
- C \(12 \mathrm{~J}\)
- D \(10 \mathrm{~J}\)
Answer & Solution
Correct Answer
(B) \(2 \mathrm{~J}\)
Step-by-step Solution
Detailed explanation
\begin{aligned} & \text { Mass of body, } m=2 \mathrm{~kg} \\ & \text { acceleration, } a=2 \hat{i}+3 \hat{j}-\hat{k} \\ & \text { displacement, } \vec{s}=3 \hat{i}-\hat{j}+2 \hat{k} \\ & \text { work done, } W=F \cdot S \\ & =m \vec{a} \cdot \vec{s} \\ & =2(2 \hat{i}+3…
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\(\begin{array}{lllc}
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\hline
\end{array}\)
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