TS EAMCET · Physics · Work Power Energy
A horizontal force \(\mathbf{F}=\left(g-x^2\right) \hat{\mathbf{i}} \mathrm{N}\) acts on a wooden block resting on a horizontal smooth surface. The work done to move the block from \(x=0\) to \(x=3 \mathrm{~m}\) (in \(\mathrm{J}\) ) is (Use \(g=10 \mathrm{~m} / \mathrm{s}^2\) )
- A 24
- B 35
- C 30
- D 21
Answer & Solution
Correct Answer
(D) 21
Step-by-step Solution
Detailed explanation
Given that, force acting on wooden block \[ \mathbf{F}=\left(g-x^2\right) \hat{\mathbf{i}} \mathrm{N} \] Displacement, \(d \mathbf{x}=d x \hat{\mathbf{i}}\) Work done by \(\mathbf{F}\) for displacement from \(x=0\) to \(x=3 \mathrm{~m}\)…
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