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Grade 10 · Physics

Grade 10 Energy, work & power worksheet

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

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What is on the worksheet

  1. A 39 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.

  2. An ideal linear spring has k = 430 N/m and extension 50 cm. Find the stored elastic energy. Round to 3 decimal places if needed. Answer in J.

  3. A model device transfers energy at constant power 560 W for 24 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.

  4. A constant 35 N force acts through a 22 m displacement. The cosine of the angle between them is -0.5. Find the work by this force. Round to 3 decimal places if needed. Answer in J.

  5. A model device transfers energy at constant power 280 W for 58 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.

  6. A 18 kg load is raised vertically by 11 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 device receives 1110 J and has useful-energy efficiency 15%. Find the useful output energy. Round to 3 decimal places if needed. Answer in J.

  8. A 3 kg object rises 4 m where g = 10 N/kg. Find gravitational potential-energy increase.

  9. A model device transfers energy at constant power 615 W for 18 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.

  10. A constant 79 N force acts through a 1 m displacement. The cosine of the angle between them is -1. Find the work by this force. Round to 3 decimal places if needed. Answer in J.

  11. A 6 kg object changes speed from 20 m/s to 16 m/s. Find final minus initial kinetic energy. Round to 3 decimal places if needed. Answer in J.

  12. A device receives 1090 J and has useful-energy efficiency 65%. Find the useful output energy. Round to 3 decimal places if needed. Answer in J.

  13. A device receives 500 J and has useful-energy efficiency 45%. Find the useful output energy. Round to 3 decimal places if needed. Answer in J.

  14. A model device transfers energy at constant power 895 W for 31 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.

  15. A constant 63 N force acts through a 26 m displacement. The cosine of the angle between them is 0.5. Find the work by this force. Round to 3 decimal places if needed. Answer in J.

  16. A device receives 610 J and has useful-energy efficiency 15%. Find the useful output energy. Round to 3 decimal places if needed. Answer in J.

  17. A device receives 260 J and has useful-energy efficiency 75%. Find the useful output energy. Round to 3 decimal places if needed. Answer in J.

  18. A 15 kg object changes speed from 13 m/s to 14 m/s. Find final minus initial kinetic energy. Round to 3 decimal places if needed. Answer in J.

  19. An ideal linear spring has k = 570 N/m and extension 9 cm. Find the stored elastic energy. Round to 3 decimal places if needed. Answer in J.

  20. An ideal linear spring has k = 710 N/m and extension 4 cm. Find the stored elastic energy. Round to 3 decimal places if needed. Answer in J.

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