A force $\mathbf{F} = (2\widehat{\mathbf{i}} + 4\ \widehat{\mathbf{j}}$)N displaces the body by $\mathbf{s} = (3\widehat{\mathbf{j}} + 5\widehat{\mathbf{k}}$)m in 2 s. Power generated will be

Question

Dr. Abubacker · Accepted Answer

(b) Work done is given by
$F \bullet s = \left( 2\widehat{i} + 4\widehat{j} \right) \bullet (3\widehat{j} + 5\widehat{k})$
=12j
Now, power=$\frac{work}{time} = \frac{12}{2} = 6w$

Q. A force $\mathbf{F} = (2\widehat{\mathbf{i}} + 4\ \widehat{\mathbf{j}}$)N displaces the body by $\mathbf{s} = (3\widehat{\mathbf{j}} + 5\widehat{\mathbf{k}}$)m in 2 s. Power generated will be

Explanation

Reviewed by Dr. Abubacker

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