A force F = 2 i ^ + 4 j ^ Newton displaces the body by s = 3 j ^ + 5 k ^ meter in 2 s . The power generated will be

Work done is given by F ⋅ s = 2 i ^ + 4 j ^ ⋅ ( 3 j ^ + 5 k ^ ) = 12 j ^ Now, power= work time = 12 2 = 6 W

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PhysicsW.E.P.PowerEasy2 minPYQ_2020

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A force $F = 2 \hat{i} + 4 \hat{j}$ Newton displaces the body by $s = 3 \hat{j} + 5 \hat{k}$ meter in $2 s$ . The power generated will be

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Answer:

Solution:

Work done is given by

$F \cdot s = (2 \hat{i} + 4 \hat{j}) \cdot (3 \hat{j} + 5 \hat{k})$ $= 12 \hat{j}$

Now, power= $\frac{work}{time} = \frac{12}{2} = 6 W$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:W.E.P.Subtopic:Power

⏱ 2mℹ️ Source: PYQ_2020

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