Back to the lesson and practice
PrintablePractice worksheet
Do it🖨️ On paper✏️ On screen
Layout1 column2 columns
Answer keyNoneAnswersWith steps
Questions10162430
LevelEasierMixedHarder
Print sizeNormalLarge print
New copyMake a new one

Free to print and copy for home or class. This link always prints the same sheet.

eurekami

Work done, power and energy costs

9th grade (Year 10 in England) · 16 questions · Common Core: NGSS.HS-PS3-1, NGSS.HS-PS3-3 · England: KS3 Physics: Energy (calculation of fuel uses and costs), KS4 Combined Science: Energy

Name

Date

Score/ 16

  1. Question 1

    A 0.5 kW heater is used for 5 hours. Electricity costs 15 cents (pence) per kWh. How much does it cost to run, in cents (pence)?

    Answer

  2. Question 2

    A force of 50 N pushes a box 40 m along the floor. How much work is done, in J?

    AnswerJ

  3. Question 3

    An appliance transfers 1200 J of energy in 30 s. What is its power, in watts?

    AnswerW

  4. Question 4

    A 0.5 kW heater is used for 3 hours. Electricity costs 25 cents (pence) per kWh. How much does it cost to run, in cents (pence)?

    Answer

  5. Question 5

    A force of 10 N pushes a box 40 m along the floor. How much work is done, in J?

    AnswerJ

  6. Question 6

    An appliance transfers 500 J of energy in 5 s. What is its power, in watts?

    AnswerW

  7. Question 7

    A 0.1 kW heater is used for 2 hours. Electricity costs 20 cents (pence) per kWh. How much does it cost to run, in cents (pence)?

    Answer

  8. Question 8

    A force of 100 N pushes a box 40 m along the floor. How much work is done, in J?

    AnswerJ

  9. Question 9

    An appliance transfers 2500 J of energy in 5 s. What is its power, in watts?

    AnswerW

  10. Question 10

    A 0.5 kW heater is used for 3 hours. Electricity costs 15 cents (pence) per kWh. How much does it cost to run, in cents (pence)?

    Answer

  11. Question 11

    A force of 250 N pushes a box 2 m along the floor. How much work is done, in J?

    AnswerJ

  12. Question 12

    An appliance transfers 240000 J of energy in 120 s. What is its power, in watts?

    AnswerW

  13. Question 13

    A 0.5 kW heater is used for 4 hours. Electricity costs 15 cents (pence) per kWh. How much does it cost to run, in cents (pence)?

    Answer

  14. Question 14

    A force of 100 N pushes a box 3 m along the floor. How much work is done, in J?

    AnswerJ

  15. Question 15

    An appliance transfers 1000 J of energy in 10 s. What is its power, in watts?

    AnswerW

  16. Question 16

    A 0.5 kW heater is used for 3 hours. Electricity costs 15 cents (pence) per kWh. How much does it cost to run, in cents (pence)?

    Answer

All done? Color in the animal! · Free from eurekami.com/math

for the adult only

Answer key: Work done, power and energy costs

  1. 1. 37.5

  2. 2. 2000 J

  3. 3. 40 W

  4. 4. 37.5

  5. 5. 400 J

  6. 6. 100 W

  7. 7. 4

  8. 8. 4000 J

  9. 9. 500 W

  10. 10. 22.5

  11. 11. 500 J

  12. 12. 2000 W

  13. 13. 30

  14. 14. 300 J

  15. 15. 100 W

  16. 16. 22.5