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Code Number:
Brand: AELAB
A sphere falls freely over certain distances. The falling time is measured and evaluated from diagrams. The acceleration due to gravity can be determined.
+ This experiment is well-designed, sturdy and convenient.
+ High precision
+ Easy to use.
+ Stainless steel rod 12mm diameter, length 1m.
+ Electromagnet integrated plumb balls.
+ Stainless steel rod 12mm diameter, length 1m (01)
+ Basket (01)
+ Steel ball (01)
+ Electromagnet integrated plumb balls.
+ H-Shaped base (01)
+ Caliper (01)
+ To determine the functional relationship between height of fall and falling time.
+ To determine the acceleration due to gravity.
Free fall experiment
Set up the free fall experiment like picture below:
Free fall experiment
Plug electromagnet and photogate to jack "0" and "1" (or "2") in digital timer
Free fall experiment: Rear of timer
Set photogate position on the second line in steel rod (below)
Free fall experiment: positioning photogate
Adjust H-Shaped base and photogate, so that the plumb ball rope is 1.3cm from the IR eye of photogate (Picture below)
Free fall experiment: adjusting plumb ball rope
Switch digital timer to Mode 3.
Attach steel ball to electromagnet.
Free fall experiment: attach steel ball
Press Start/Stop button to release the ball, then press Start/Stop again to read time on digital timer.
Each position, we do three times, then take the average value.
The data table, plots below:
From the formula for free fall theory:
From the plot 2, g = 2 x 470.11 = 940.22 (cm/s2) = 9.4022 (m/s2)
Theorical value: g = 9.81m/s2
So error: 4.18%