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Work

If F⃗ and ...

Question

If $\to F$ and $\to S$ are force and displacement respectively, the work done is zero if

\to F

and

\to S

are opposite in direction

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\to F

and

\to S

are in same direction

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\to F

is greater than

\to S

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\to F

and

\to S

are mutually perendicular

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Solution

The correct option is D $\to F$ and $\to S$ are mutually perendicular
Work done is $W = \to F . \to S = F S c o s θ$
$∴ W = 0$ if $¯ F$ and $¯ S$ are mutually perpendicular.
Since $c o s 90^{0} = 0$ So, $W = 0$

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Similar questions

(\to F) = 4^i + 5^j

(\to S) = 3^i + 6^j

\to F = 5^i + 3^k j + 4^k

\to s = 6^i - 5^k

A

\to F = 2^i + 4^j +^k

\to S = 3^i + 2^j + 5^k

\to F = (5^i + 4^j) N

\to S = (6^i - 5^j + 3^k) m

\to F = 2^i + 3^j + 4^k

\to S = 3^i + 2^j + 5^k

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