More than one method could be used to investigate the relationship between the force, mass and acceleration. This method will vary the masses added to trolleys.
To investigate the relationship between the force, mass and acceleration by varying the masses added to trolleys.
The diagram shows apparatus that can used in this investigation. A constant stream of air reduces the friction between the glider and the air track.
Record the results in a suitable table, similar to the example results below:
|Number of weights on stack||Force in N||Acceleration in m/s² - Run 1||Acceleration in m/s² - Run 2||Acceleration in m/s² - Run 3||Acceleration in m/s² - Mean|
Acceleration is direcly proportional to the force applied to the object. This means that a graph of force against acceleration should produce a straight line that passes through the origin.
To what extent do your results show this relationship? For example, do all your points lie on a straight line passing through the origin, or are there any anomalous points?
|Electrical appliance (air blower)||Electrical fault - fire/shock||Check mains cable and plug are not broken or wiring exposed before use|
|Masses and/or glider falling to floor||Objects falling on feet - bruise/fracture||Use relatively small masses and step back after releasing glider|