4. When the displacement is along the same direction of the force, then the work is said to be:
a. Zero
b. Negative
C. Positive
d. Infinite
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2
Answer:
When the displacement is along the same direction of the force, then the work is said to be positive because
W=∫F.ds = ∫F ds cosФ
cosФ = 1 if angle is 0.
So W=∫F ds = +ve
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When the displacement is along the same direction of the force, then the work is said to be positive.
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