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Ok, that was an interesting problem.
The 70 kg person at x=3 creates a clockwise torque. (duh!)To counteract this CW torque a downward force at N1 creates a CCW torque. (not so obvious!) These counteracting torques keep the diving board in rotational equilibrium.
Ok, that was an interesting problem.
The 70 kg person at x=3 creates a clockwise torque. (duh!)
To counteract this CW torque a downward force at N1 creates a CCW torque. (not so obvious!)
These counteracting torques keep the diving board in rotational equilibrium.