AS physics, projectiles

4
Measuring 'g' in freefall Apparatus light gate beaker clamp METAL BALL powerpac

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As physics projectiles, edexcel

Transcript of AS physics, projectiles

Measuring 'g' in freefall

powerpackbeakerlight gate clampMETAL BALLApparatus

Method1. Set up the apparatus as shown above.2. Turn on the power pack.3. Turn on the light gate and check zero error.4. Attach a metal sphere to the electro magnet5. Then turn off the light gate and the sphere will fall between the two light gates into the beaker.6. Note down the value on the light gate.7. Repeat the experiment 3 times.8. Take the average.9. If the values are similar then the answers are reliable.

ResultsDisplacement (m)Time 1 (s)Time 2 (s)Time 3 (s)Average t2 (s)

0.1000.14280.12710.13990.0187

0.2000.20190.19590.16960.0358

0.3000.24730.24240.23000.0575

0.4000.28560.26840.25990.0736

0.5000.31930.26180.28420.0832

0.6000.34970.29230.30780.1002

0.7000.37780.30980.32490.1139

0.8000.40390.35540.37150.1421

0.9000.42840.39840.41120.1703

1.0000.45150.43800.43020.1935

Graph

ConclusionThe higher the displacement the more time it takes to reach the ground as there more distance to travel. Therefore velocity is constant.When the displacement was 0.1m it took the ball 0.1366 seconds to reach the beaker, on the other hand, when the displacement was 0.6m it took the ball 0.1366 and when the displacement was 1m it took the ball 0.4399.

EvaluationPercentage difference in g (acceleration):[(9.81-5.74)/9.8] x 100 = 41.53%5.74m/s is far off the original value which is (9.81m/s), which could be a reason of human error, by not measuring displacement accurately, or because of zero error.