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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

1.2N

B

3.6N

C

2.4N

D

4N

Text Solution

Verified by Experts

The correct Answer is:
D
`r_(1) F_(1) = r_(2)F_(2)`
`rArr 1.6 xx 1= 0.4 xx F_(2) rArr F_(2)= (1.6)/(0.4) = 4N`
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