Conservation of mechanical energy during a free fall EXPERIMENTS
::
E-305
Procedure:
Mount the timer securely at a height L of about 2 meters
Required Equipment
over the floor. See illustration.
Place the timer tape in the timer being careful to allow
2005.00 Ticker tape timer 1,00 Pcs
the tape to pass on the correct side of the carbon paper.
2005.20 Tape 1,00 Pcs
Attach the weight with the mass m to the timer tape. The
2005.30 Carbon, 50 pcs. 1,00 Pack
timer tape should be about 10 cm shorter than the fall
2005.40 Drop weight, 1 kg 1,00 Pcs
height.
2005.50 Drop weight, 1/2 kg 1,00 Pcs
Conduct the experiment. Start the timer, then imme -
2005.60 Drop weight, 1/4 kg 1,00 Pcs
diately release the weight, so the tape is pulled through
3610.50 Power Supply 1-12 V AC/DC 1,00 Pcs
the timer. Retrieve the timer tape and analyze the results Rods, clamps, cables.
as described above
In a “perfect” experiment the total mechanical energy
should be equal to zero during the fall of the weight,
because the loss in potential energy is converted to a
gain in kinetic energy. In practice of course this will not
be fulfilled due to the friction of the tape moving through
the holder and through the air, the mass of the tape and
other factors.
∇
L s
®
Science Equipment for Education Physics
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