Chapter 3 - Forces
In the GCE A Levels, we must understand that the weight of an object is calculated as the product of its mass and the acceleration due to gravity. The weight always acts downwards and from the centre of gravity of the object.
In the GCE A Levels, tension is a common force we must deal with. This is the force we get in a string or rod when it is taut. Here we understand that tension must always act away from the object we are studying, and if we are looking at the same string or rod, the tension must be uniform throughout.
In the GCE A Levels, we have to recognise that objects that are touching a surface, will experience a normal contact force from that surface. We will understand some of the key features of the normal contact force, including what it means, and also how it should be represented.
In the GCE A Levels, it is possible to study systems where different springs are connected in parallel or series systems. This video will discuss how to tackle such problems and how to combine the various spring constants into one effective spring constant.