A door 1.6 m wide requires a force of 1N to be applied at the free and to open or close it. The force that is required at a point 0.4 m distance from
A door 1.6 m wide requires a force of 1N to be applied at the free and to open or close it. The force that is required at a point 0.4 m distance from the hinges for o[ening or closing the door is
A. 1.2 N
B. 3.6 N
C. 2.4 N
D. 4 N
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Correct Answer - D
`tau` required to open/close the door wil remain constant.
`r_(1)xx F_(1)=r_(2)xx F_(2)`
`1.6xx1=0.4xx F_(2)`
`implies F_(2)=4 N`
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