AP EAMCET · PHYSICS · Work Power Energy
Work done
- A can only be positive
- B can only be negative
- C can either be positive or negative
- D cannot be assigned a sign
Answer & Solution
Correct Answer
(C) can either be positive or negative
Step-by-step Solution
Detailed explanation
Work done by a constant force is given as \(W=F s \cos \theta\) where, \(F=\) applied force \(s=\) displacement and \(\theta=\) angle between the direction of force and displacement. When, \(\theta=0^{\circ}\), then \(W=F s\) (positive) When, \(\theta=90^{\circ}\), then…
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