Finding Acceleration Due to Gravity by Freefall Experiment
Autor: Ekam26 • March 5, 2019 • Lab Report • 435 Words (2 Pages) • 4,360 Views
Topic:
Finding acceleration due to gravity by freefall experiment
Research Question:
How to find the value of ‘g’ by doing a free fall experiment
Hypothesis:
The value of ‘g’ will tend towards 9.8ms-2 as the distance of the freefall is increased as the accuracy increases when distances increases.
Variables:
Independent variable: The distance of the free fall. The distance between the ball and the floor to where it is dropped.
Dependent variable: The time taken for the ball to reach the ground.
Constant variable: The ball, the ruler used to measure the height of the fall, the stopwatch, the room in which the freefall was done.
Apparatus and materials:
Table 1.1
Apparatus | Quantity | Use |
1m rule | 2 | For measuring the distance between the ball and the ground |
A stopwatch | 1 | To measure the time of the fall |
A measuring tape | 1 | Used to measure the bigger distance when it was |
A rubber ball | 1 | Was dropped from different height |
Procedure:
- Take a rubber ball and a metre rule.
- Decide the different heights to do the freefall.
- Take the metre rule and stick it to a straight wall. Check if the wall is perpendicular to the ground by using a set square.
- Take the ball in one hand and give the stopwatch to your partner (if u have any).
- Keep the bottom of the ball on top of the metre rule as the bottom part of the ball is going to touch the ground first.
- Drop the ball and while doing so start the stopwatch. Try to be as accurate as possible. Make sure you avoid making zero error while using a stopwatch.
- Drop the ball from the same height multiple times and take the average of all the readings.
- Drop the ball multiple times from different heights and take the average of all the heights.
Raw Data:
Table 1.2
Height of the drop/metres (±0.005m) | Time 1/ seconds (±0.01sec) | Time 2/ seconds (±0.01sec) | Time 3/seconds (±0.01sec) |
1.525 | 0.53 | 0.56 | 0.54 |
2.265 | 0.54 | 0.53 | 0.56 |
3.55 | 0.78 | 0.78 | 0.72 |
Analysis
Taking average of time for a height:
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