The BRM-e

1 Homework Tasks

Calculate It: Pulleys

Calculate the speed at which your racer will travel per hour using the following pulley wheel system. Make sure you show all your working out.

  • Driver pulley: 10mm
  • Driven Pulley: 40mm
  • Wheel Diameter: 20mm
  • Motor rpm: 4000rpm

2. Research It: Types of energy

Explain the energy conversions that happen in the following systems. Use the web to help you. Describe what it is converted from and what it is converted to. Explain the basic operation of the system.

  • A Generator
  • An Incandescent bulb
  • A steam engine
  • A Solar cell (photo-voltaic cell)
  • A Wind turbine

3.  Electric Cars – Advantages & Disadvantages

Electric cars are becoming more common, and engineers need to understand both their benefits and their challenges. Use your knowledge and the information discussed in class to answer the questions below.

1. Easy: List two advantages of electric cars.

Hint: Think about pollution and running costs.

2. Slightly Harder: List two disadvantages of electric cars.

Hint: Think about distance and charging.

3. Intermediate: Explain why electric cars are better for the environment than petrol cars, and mention one environmental drawback.

4. Challenging: Compare the running and maintenance costs of electric cars with petrol cars. Why might some drivers save money overall?

5. Most Difficult: Evaluate whether electric cars are a suitable long‑term solution for sustainable transport. Include at least one advantage, one disadvantage, and your own conclusion.

Your answer should give a balanced argument and end with your own opinion.