Edexcel IGCSE Physics 4.3 Conservation of Energy Questions
Use the conservation principle to account for energy in car batteries, falling parachutists and devices with less than 100% efficiency.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- State that energy cannot be created or destroyed, and identify where transferred energy goes.
- Explain how decreasing kinetic or gravitational stores transfer energy to another store, including thermal energy produced by friction.
- Calculate wasted energy by subtracting useful output from total energy transferred.
Edexcel IGCSE Physics 4.3 Conservation of Energy Questions question 1
The photograph shows a toy car. When the toy car is pulled backwards, energy is stored in the elastic store as the rubber band is twisted.
When the car is released, some of the energy from the elastic store is transferred to the kinetic store of the car.
The remaining energy is transferred into the thermal store of the surroundings.
Question (a)
(a)
State what is meant by the principle of conservation of energy.
Question (b)
(b)
The car is pulled backwards so that there is 165 J of energy in its elastic store.
When the car is released, this energy is transferred to the car's kinetic energy store with an efficiency of 15\%.
Question (i)
(i)
Calculate the energy transferred into the thermal store of the surroundings.
energy transferred to thermal store = ............ J
All question bank results loaded