If a force vec F = 4hat{i} + 5hat{j} causes a displacement vec s = 3hat{i} + 6hat{k} , work done is

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5.Work, Energy, Power and Collision

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If a force $\vec F = 4\hat i + 5\hat j$ causes a displacement $\vec s = 3\hat i + 6\hat k$, work done is

A$4 \times 6$ unit

B$6 \times 3$unit

C$5 \times 6$unit

D$4 \times 3$unit

Solution

(d)$W = \overrightarrow F .\overrightarrow s = (4\hat i + 5\hat j + 0\hat k).(3\hat i + 0\hat j + 6\hat k)$ $ = 4 \times 3$ units

Standard 11

Physics

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