In: Physics
A 6 kg lance 3 m long lance is balanced about an
unknown pivot. A 2 kg pennant hangs 30 cm from one end. The
point
of the lance weighs 1 kg. Draw a rigid body diagram for the lance
and find where you should put your finger so that the
lance balances.
Now the lance is pivoted about its center. If a
reasonably smart knight applies a force to the NON-sharp end of the
lance
at an angle of 30 degrees relative to the horizontal, what force
must they apply to keep the lance from rotating?