How is energy stored and transferred at 4 different points during the launch and flight of the trebuchet?Each paragraph have to explain each different point. It has to be very specific and...

How is energy stored and transferred at 4 different points during the launch and flight of the trebuchet?

Each paragraph have to explain each different point. It has to be very specific and detailed.

Please i need this by Jan 17th 2012 11:59 P.M.

Asked on by jepakh

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bandmanjoe | Middle School Teacher | (Level 2) Senior Educator

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The trebuchet was a weapon used in the Middle Ages to place castles and other fortified areas under siege.  It involved the use of a long throwing arm hurling some type of projectile at the walls of the castle.  Trebuchets were very instrumental in the destruction of fortified walls.

The first point we would describe is when the trebuchet has the counterweight lifted to the "ready" position, with the projectile loaded into the sling, or pouch.  This position is 100% potential energy, 0% kinetic energy. (potential energy is "stored energy", while kinetic energy is "moving energy")

The second point would be just after we release the firing mechanism on the trebuchet, where the counterweight is at the bottom of it's swing and the throwing arm is in an upright position, in mid-swing.  This represents 0% potential energy and 100% kinetic energy.

The third point would follow the counterweight as it swings through with it's momentum.  It is building potential energy again, but it won't be as much as the initial potential energy, due to the fact some has been transferred into friction, sound, etc.  At this point, when the counterweight stops ascending, due to the force of gravity, we again have potential energy at 100% and kinetic energy at 0%.

The trebuchet will continue some minor swings, each one less than the one before, as the energy that is left slowly is transferred to friction, heat, and sound.  The fourth and final position would be as the trebuchet stands motionless, with the counterweight at the bottom, the throwing arm in an upright, vertical position.  Energy at this position would be 0% potential energy and 0% kinetic energy.

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