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This lesson covers the different types of forces, weight and gravitational field strength, resultant forces, and free body diagrams — as required by the Edexcel GCSE Physics specification (1PH0), Topic 1: Key Concepts of Physics. You need to understand how forces are classified, how to calculate weight, and how to determine the effect of resultant forces on motion.
A force is a push or a pull that acts on an object due to the interaction with another object. Forces can:
Forces are measured in newtons (N) and are vector quantities — they have both magnitude and direction.
Forces are classified into two categories based on whether the objects need to be touching.
Contact forces act between objects that are physically touching.
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