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Question

Four forces, tangent to the radius R, are acting on a wheel as shown in the figure. The resultant equivalent one force system will be,

A
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B
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C
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Solution

The correct option is C
For the equivalent force system, Fnet & τnet, about point O must be same.

Fnet:

Fnet=(400)2+(300)2=500 N
and, tanα=400300 α=53

& about point O,
τnet=400R200R+200R+100R
=500R (Clockwise)
So, the system can be shown as


Hence, (C) is the correct answer.

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