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Figure 3 shows a spinning flywheel - Edexcel - GCSE Physics: Combined Science - Question 3 - 2018 - Paper 1
Question 3
Figure 3 shows a spinning flywheel. (i) State how energy is stored in a spinning flywheel. (ii) State one way to increase the amount of energy stored in the flywhe... show full transcript
Worked Solution & Example Answer:Figure 3 shows a spinning flywheel - Edexcel - GCSE Physics: Combined Science - Question 3 - 2018 - Paper 1
Step 1
State how energy is stored in a spinning flywheel.
Answer
Energy is stored in a spinning flywheel as kinetic energy. This kinetic energy depends on the mass of the flywheel and the square of its angular velocity, described by the equation:
KE = rac{1}{2} I heta^2
where is the moment of inertia, and is the angular velocity.
Step 2
State one way to increase the amount of energy stored in the flywheel.
Answer
One way to increase the amount of energy stored in the flywheel is to increase the speed of spinning. By increasing the angular velocity, the kinetic energy stored in the flywheel will increase significantly, as this energy is proportional to the square of the angular velocity.