A wheel of radius 20 cm has forces applied to it as shown in the figure. The torque produced by the forces 4N at A, 8N at B, 6N at C, and 9N at D at angles indicated is :

Options

A. 5.4 N-m Anticlockwise
B. 1.8 N-m Clockwise
C. 2.0 N-m Clockwise
D. 5.4 N-m Clockwise

Answer

B

Explanation

`tau_("net")=8xx(0.1)+9xx(0.2)-4xx(0.2)`
`tau_("net")=2.6-0.8 = 1.8 N-m`