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A door 1.6 m wide requires a force of 1 ...

A door 1.6 m wide requires a force of 1 N to be applied at the free and to open or close it. The force that is required at a point 0.4 m distant from the hinges for opening or closing the door is

A

`1.2` N

B

`3.6` N

C

`2.4` N

D

4 N

Text Solution

Verified by Experts

The correct Answer is:
D
`r_(1)F_(1)=r_(2)F_(2)`
implies `1.6xx1=0.4xxF_(2)impliesF_(2)=(1.6)/(0.4)=4N`
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