🔬 Unit 5 — Paper 1
Unit 5 — Essential Science for Engineering and Manufacturing
Unit 5 gives you the scientific foundations that underpin engineering. Electricity, forces, energy, waves and matter — these aren't just physics topics, they're the building blocks of how every engineered product works. Whether you're designing a circuit, understanding why a bridge bends or knowing how heat moves through a material, the science in this unit gives you the 'why' behind the 'what'.
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Some topics covered in this unit
Forces and motion — Newton's laws, pressure, moments and equilibrium in engineering structures
Electricity and circuits — current, voltage, resistance, Ohm's law, series and parallel circuits
Energy and power — types of energy, energy transfer, efficiency calculations and power
Materials science — properties of materials, stress and strain, Young's modulus and material behaviour under load
Waves and light — properties of waves, electromagnetic spectrum and applications in engineering
Thermodynamics — heat transfer by conduction, convection and radiation, and temperature measurement
Sample question
Electricity
A resistor has a voltage of 12 V across it and a current of 3 A flowing through it. What is its resistance?
✓ Correct answer: B — 4 Ω. Using Ohm's Law: R = V ÷ I = 12 ÷ 3 = 4 Ω. Ohm's Law states that voltage (V) equals current (I) multiplied by resistance (R). Rearranging gives R = V/I.
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