Suppose we observe a Lever in equilibrium, why is the FORCE exerted by the fulcrum on the board NOT considered as part of the system if we talk about TORQUE?
2007-09-06 22:11:04 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics
torque = force x lever arm or the distance of the force from the fulcrum...
at the fulcrum, the lever arm = 0,
thus...
torque = 0, no matter how large the force.
2007-09-07 01:29:42 · answer #1 · answered by quigonjan 3 · 0⤊ 0⤋
The resulting supporting force at the fulcrum is part of the whole system in equilibrium , but it is not a torque because there is no distance from itself. The two torques from each end are in balance around the fulcrum and those two downward forces at the ends are also balanced with the one upward force through the fulcrum.
2007-09-06 22:27:09 · answer #2 · answered by Bomba 7 · 1⤊ 0⤋