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Minimum work will be done if the angle b...

Minimum work will be done if the angle between the impressed force and displacement caused is

A

`90^@`

B

`60^@`

C

`45^@`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
A
Work done Is equel to the dot product of the two vectors force and displacement.
Work= force `xx` displacement
` = F . S cos theta`
For minimum velue of work, `theta ` should be `90^@`,
`:. cos 90^@ = 0 :. theta = 90^@`
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