Zero Net Torque Conditions

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  The net force on the segment is nevertheless zero because: A. the net torque due to the external and muscle forces is zero. B. there are contact forces at joints. C. gravitational forces should not be included in equilibrium conditions.

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  As the beam is in equilibrium the net force acting on it must be zero and the net torque acting on the beam should be zero.

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  In order for it not to pivot, the net torque must be zero. (please see the attached file) Since the system is static, the net force and net torque acting on the beam are both zero.

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  The resultant force on the person is given by Gives ------------------------------------ (1) For rotational equilibrium of the person the net torque him must be equal to zero.

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  Now for rotational equilibrium net torque on the tray must be equal to zero.

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  For this to be an equilibrium position, 2 things must be true: 1) Net force on the ball cylinder must be zero 2) Net torque about the cylinder must be zero.

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  If net force on the body is non zero, the body will accelerate in the direction of net force whereas if net torque is non zero, the body will have angular acceleration in the direction of net torque.

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• Forces Exerted by Achilles Tendon Applied to Bicycle

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