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Determination of the acceleration due to gravity (g)

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  • Essay length: 2347 words
  • Submitted: 15/07/2008
  • Reviewed by: (?) k9markiii
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AS and A Level Fields & Forces

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4 star(s)

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The first 200 words of this essay...

Determination of the acceleration due to gravity (g)

By-nanding Li

Introduction

Gravity is the force at which the earth attracts objects towards it; also know as the weight of objects. When objects fall towards the earth, their acceleration increases because of the gravity. This acceleration due to gravity is dependent on the object's mass.

A free falling object, if gravity s the only force acting on an object, then we can know the object will accelerate at a rate of 9.81ms-2 down toward the centre of the earth, this is known as acceleration due to gravity and is given the symbol 'g'. We can find the force causing this acceleration using:

F = ma

And weight for the object:

G = mg

Where the 'm' is the mass of object and 'g' is the acceleration due to gravity.

However, acceleration due to gravity is not the same through out the universe. The moon has a smaller acceleration due to gravity than the earth. If we were to drop a stone on the moon, it would fall more slowly. This does not

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Review of essay

Reviewed by: k9markiii

Rating: 4 star(s)

Response to the question

There are several misconceptions and lack of precision with physical ideas in the work. Notably, not mentioning that all bodies with mass are affected by gravity, that mass is independent of acceleration, when neglecting air resistance, and thinking that air resistance is less inside.
Generally, a lot of planning has gone into this experiment. It has been clearly structured but the length of the report made it difficult to follow as it was explaining three separate experiments.

Level of analysis

The way this experiment was carried out appears good though diagrams would aid the reader's understanding. The use of uncertainties is good and well explained. However it is very important that the graph is shown as this gives a good indication of how close the points are to a line of best fit.

Quality of writing

The writing is generally good but has some typos. Most scientific terms are spelt correctly.

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