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If the force applied is perpendicular to...

If the force applied is perpendicular to the handle of the spanner as shown in the diagram, find the (i) torque exerted by the force about the center of the nut, (ii) direction of torque and (iii) type of rotation caused by the torque about the nut.

Text Solution

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Arm length of the spanner, `r=15 cm =15xx10^(-2)m`
Force,`F=2.5N`
Angle betweemn r and F `theta=90^(@)`.

(i) Torque, `tau=r f sin theta`
`tau =15xx10^(-2)xx2.5xx sin (90^(@)) " " [ "here sin 90^(@)=1]`
`tau=37.5xx10^(-2)Nm`.
(i) As per the right hand rule, the direction of torque is out of the page.
(ii) The type of rotation caused by the torque is anti-clockwise. Ex.5.8. A force of (41-39 +5k) N is applied at a point whose position vector is
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