Drop Shot, 1D60.20

Location:

• Cabinet: [:MechanicsCabinet:Mechanic (ME)]

• Bay: [:MechanicsCabinetBayA5:(A5)]

• Shelf: #2

attachment:DropShot-02-400.jpg

Description:

The drop shot is an apparatus designed to simultaneously drop one steel ball and shoot another one forward with spring power. It can be mounted on a ring stand or a bench clamp.

Important Setup Notes:

• N/A

Setup:

1. Setup the ring stand or bench clamp on the table.
2. Mount the apparatus in such a way that the projectile's plane of flight is perpendicular to the class.

Cautions, Warnings, or Safety Concerns:

1. Pay attention to where the balls will land.

Demonstration:

Tell students to pay attention to the vertical motion of balls. The fact that one of them has a horizontal velocity does not affect its motion in the vertical direction. The balls hit the ground at the same time. Make the analogy about simultaneously firing a bullet out of a gun and dropping one from the end of the barrel.

References:

• Use the Tall cart for a better show. Push ball down in the cart and insert the retaining pin in the bottom whole of the tall ballistic cart. The retaining pin is attached to a string with is tide to a C-clamp and clamped to the bench. The bridge is placed about one string length in front of the cart when the retaining pin string is taunt. Lineup the cart with the bridge so that when you give the cart a good push the retaining pin is pulled out by the string which is C-clamped to the bench. Thus releasing the ball that was in the cart. The cart should roll under the bridge and the ball should go over the bridge. The ball should land back inside the cart on the other side of the bridge.

Use either an air hoses or a board and eraser as bumpers to prevent cart from falling of the bench.

PROCEDURE:

SETUP: Take the C-clamp with the release pin tied to it and clamp it to the side of the bench. Load the cannon by placing the steel ball in the cannon and push the ball down as far as you can. Then insert the release pin in to the small whole in the side of the cannon. The taller cart has two wholes, use the lower one. Roll the loaded cart out as far as the string will let you without releasing the pin. This gives you a distance guide, lets call it "L", to put the bridge. Place the bridge at a distance of 3/2L from the C-clamp, But no farther then 2L. Make sure the cart can go under the bridge without hitting the top of the bridge. Also make sure there is something to stop the cart on the other side of the bridge so that the cart does not fly off the bench. Use something like an air hose or 2 bar erasers and lead bricks.

1. List any references

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