A torque of 0.5Nm is required to drive a screw into a wooden frame with the help of a screw driver. If one of the two forces of couple produced by screw driver is 50N, the width of the screw driver is:
0.75cm
1cm
0.5cm
1.5cm
A
1cm
B
0.5cm
C
1.5cm
D
0.75cm
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Solution
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Let width be x. So the torque due to couple is 2×50×x/2=50x
50x=0.5⇒x=0.01m=1cm
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