Material: a rigid plastic tube (which would be blowgun), an electromagnet, a power supply DC power from
Purpose: show that in a parabolic motion of a severe horizontal and vertical motions are independent and that the time of vertical fall is the time of horizontal displacement;
Procedure: mount the tube horizontally on one of the two supports, attaching the electromagnet to the other support, adjusting the height and direction of the blowgun to aim at position to deal with the ball hooked all'elettrocalamita. Secure with scotch tape the wires with terminal ends of the tube, they attach to a strip of aluminum foil, so that it covers the exit hole of the blowpipe.
The structure of the equipment is summarized in the following figure:
all'elettrocalamita Hook the metal ball and use the other as "bullet" in the blowpipe.
Before proceeding with the experience itself must be "calibrated" the pole of the blowgun horizontally and vertically to achieve alignment with the metal ball.
When the ball breaks the foil projectile breaks the circuit and determines the fall of the ball is supported by the electromagnet. The two balls then start at the same time their motion vertical drop. The difference between the two is that the ball projectile, having also a horizontal initial velocity, describes a parabolic motion.
balls collide in a point located at the vertical of the electromagnet. This shows that the downward shift of the metal ball is the same as that of the ball projectile, at the same time interval. In addition, the time taken by the metal ball to fall along the vertical is the same ball used by the projectile along the horizontal line that corresponds to the distance between the electromagnet and exit point from the blowpipe.
A confirmation of impact occurred, in many cases the glass ball breaks.
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