StudyBrixFree worksheets, study guides and courses

Grade 7 · Physics

Grade 7 Energy, work & power worksheet

20 questions on energy, work & power. The answer key is a separate download.

Open and downloadGet the answer keyChange the questions

What is on the worksheet

  1. A 12 kg load is raised vertically by 7 m in a field g = 10 N/kg. Find its gravitational potential-energy gain. Round to 3 decimal places if needed. Answer in J.

  2. A 16 kg load is raised vertically by 17 m in a field g = 10 N/kg. Find its gravitational potential-energy gain. Round to 3 decimal places if needed. Answer in J.

  3. A model device transfers energy at constant power 120 W for 10 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.

  4. A model device transfers energy at constant power 25 W for 56 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.

  5. A 7 kg load is raised vertically by 17 m in a field g = 10 N/kg. Find its gravitational potential-energy gain. Round to 3 decimal places if needed. Answer in J.

  6. A 8 kg load is raised vertically by 19 m in a field g = 10 N/kg. Find its gravitational potential-energy gain. Round to 3 decimal places if needed. Answer in J.

  7. A 25 kg load is raised vertically by 7 m in a field g = 10 N/kg. Find its gravitational potential-energy gain. Round to 3 decimal places if needed. Answer in J.

  8. A model device transfers energy at constant power 615 W for 50 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.

  9. A model device transfers energy at constant power 995 W for 46 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.

  10. A 16 kg load is raised vertically by 7 m in a field g = 10 N/kg. Find its gravitational potential-energy gain. Round to 3 decimal places if needed. Answer in J.

  11. A model device transfers energy at constant power 680 W for 41 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.

  12. A model device transfers energy at constant power 780 W for 20 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.

  13. A model device transfers energy at constant power 100 W for 46 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.

  14. A 27 kg load is raised vertically by 26 m in a field g = 10 N/kg. Find its gravitational potential-energy gain. Round to 3 decimal places if needed. Answer in J.

  15. A 31 kg load is raised vertically by 16 m in a field g = 10 N/kg. Find its gravitational potential-energy gain. Round to 3 decimal places if needed. Answer in J.

  16. A 19 kg load is raised vertically by 17 m in a field g = 10 N/kg. Find its gravitational potential-energy gain. Round to 3 decimal places if needed. Answer in J.

  17. A model device transfers energy at constant power 215 W for 25 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.

  18. A 29 kg load is raised vertically by 20 m in a field g = 10 N/kg. Find its gravitational potential-energy gain. Round to 3 decimal places if needed. Answer in J.

  19. A model device transfers energy at constant power 435 W for 55 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.

  20. A 35 kg load is raised vertically by 25 m in a field g = 10 N/kg. Find its gravitational potential-energy gain. Round to 3 decimal places if needed. Answer in J.

More worksheets like this