GCSE Physics Exam-Style Questions: Conservation and Dissipation of Energy
Question 1
Q1. Knowledge Recall (1 mark)
Define the term "energy transfer".
Question 2
Q2. Application (2 marks)
Explain why the total energy in a closed system remains constant.
Question 3
Q3. Calculations (3 marks)
A car weighing 1200 kg travels at 20 m/s. Calculate its kinetic energy.
Question 4
Q4. Knowledge Recall (1 mark)
What is the SI unit of energy?
Question 5
Q5. Data Analysis (2 marks)
A bar chart shows the energy transformations in a hydroelectric power plant. The bar for "potential energy in water" is tallest. The next tallest is "kinetic energy in water". Explain this pattern.
Question 6
Q6. Calculations (4 marks)
A person with a mass of 80 kg lifts a box to a height of 1.5 m. Calculate the change in gravitational potential energy of the box. (g = 9.8 m/s^2)
Question 7
Q7. Application (3 marks)
Describe the role of friction in a car braking system.
Question 8
Q8. Data Analysis (3 marks)
A graph shows the energy changes in a solar cell. The graph shows that the solar cell has an efficiency of 25%. Explain what this means.
Question 9
Q9. Knowledge Recall (1 mark)
What is the name of the energy that an object has due to its movement?
Question 10
Q10. Application (2 marks)
Explain how the energy stored in a battery is converted into electrical energy.