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Tutor HuntTest QuestionsPhysics QuestionsYear 10 Physics Questions

 

Energy Transfers In A System (GCSE Physics)

The following is a GCSE Physics test covering 'Energy Transfers In A System' from the broader topic Energy. The test is geared towards the AQA exam board style syllabus.
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A toy airplane is launched by a spring with k = 50 N/m, extension 0.12 m and mass 0.020 kg. Using energy conservation (½ k x^2 ? ½ m v^2) what is the maximum speed just after launch (m/s)?
When a moving car brakes, which energy store increases in the brakes?
An LED has total power input 4.0 W and efficiency 0.85. What is the useful power output (W)?
A wind farm produces 696 MW which serves 580 000 homes. What is the mean power needed per home (W)?
Which equation links power P, potential difference V and current I?
Which equation links energy (E), power (P) and time (t)?
Two identical bungee cords, each with spring constant 735 N/m and each extended by 8.0 m, store energy which lifts a 240 kg pod. What maximum height (m) will the pod reach? (g = 9.8 N/kg)
Which equation links momentum p, mass m and velocity v?
Which energy store increases when water is heated?
The energy required to melt 0.015 kg of ice was 5010 J. What is the specific latent heat of fusion of water (J/kg)?
A transmission cable has a power loss of 1.60 × 10^9 W and the current is 2000 A. What is the resistance of the cable (O)? (Use P = I^2 R)