Finding Acceleration Due to Gravity by Freefall Experiment

Autor:   •  March 5, 2019  •  Lab Report  •  435 Words (2 Pages)  •  4,308 Views

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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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