A force, $\to F = 2^i + 2^j$ acts on a 2 kg body which got displaced from (0,0,0) to (5,0,0). The work done by this force is .

-10 J

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10 J

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15 J

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-15 J

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Solution

The correct option is B 10 J
The component of force along the displacement is only needed for calculating its work done.
Here, $\to F = 2^i + 2^j$ and $\to s = 5^i$
W = $\to F . \to s = (2^i + 2^j) . (5^i)$
= 10 J

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A force,→F=2^i+2^j acts on a 2 kg body which got displaced from (0,0,0) to (5,0,0). The work done by this force is .

The correct option is B 10 JThe component of force along the displacement is only needed for calculating its work done. Here, →F=2^i+2^j and →s=5^i W = →F.→s=(2^i+2^j).(5^i) = 10 J

A force, $\to F = 2^i + 2^j$ acts on a 2 kg body which got displaced from (0,0,0) to (5,0,0). The work done by this force is .

The correct option is B 10 J
The component of force along the displacement is only needed for calculating its work done.
Here, $\to F = 2^i + 2^j$ and $\to s = 5^i$
W = $\to F . \to s = (2^i + 2^j) . (5^i)$
= 10 J