A Bicycle Pedal Is Pushed by a Foot with a Force

question 18

Short Answer

A bicycle pedal is pushed by a foot with a force of a-N as shown. The shaft of the pedal is $12$ cm long.
Find the magnitude of the torque about P correct to two decimal places.
Let $a = 66$ N, $b = 70 ^ { \circ }$ , $c = 10 ^ { \circ }$ .

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