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Finding Acceleration Due to Gravity by Freefall Experiment

Autor:   •  March 5, 2019  •  Lab Report  •  435 Words (2 Pages)  •  83 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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