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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 437 · 40 questions
TalentJR

Engineer's tip (Less force, more distance): MA = load ÷ effort. Work (J) = force (N) × distance (m); force = work ÷ distance; distance = work ÷ force. Ideal ramp: MA = length ÷ height, effort = load ÷ MA.

NameDateTime takenScore ___ / 40
  1. 1.🏋️ A force of 230 N did 2300 J of work. How many metres did the object move?
  2. 2.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Pushing a crate 10 m took 1300 J of work. What force was used, in newtons?
  4. 4.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  6. 6.🏋️ Pushing a crate 1 m took 380 J of work. What force was used, in newtons?
  7. 7.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 420 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 360 N did 3600 J of work. How many metres did the object move?
  10. 10.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
  12. 12.🏋️ A force of 390 N pushes a cart 4 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 120 N pushes a cart 10 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 380 N pushes a cart 1 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Pushing a crate 4 m took 360 J of work. What force was used, in newtons?
  17. 17.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 180 N did 540 J of work. How many metres did the object move?
  20. 20.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 250 N pushes a cart 4 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 7 m took 2590 J of work. What force was used, in newtons?
  23. 23.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Pushing a crate 8 m took 3920 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 60 N pushes a cart 10 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 490 N did 1960 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 140 N pushes a cart 9 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ Pushing a crate 10 m took 4700 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 400 N did 1600 J of work. How many metres did the object move?
  35. 35.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 210 N did 210 J of work. How many metres did the object move?
  39. 39.🏋️ Pushing a crate 3 m took 180 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 370 N pushes a cart 5 m along the floor. How much work is done, in joules?

Answer key

  1. 10
  2. 6
  3. 130
  4. joule (J)
  5. no, work stays the same
  6. 380
  7. 2
  8. 840
  9. 10
  10. 1000
  11. less effort
  12. 1560
  13. 1200
  14. 2
  15. 380
  16. 90
  17. 4
  18. 3
  19. 3
  20. 250
  21. 1000
  22. 370
  23. 450
  24. 490
  25. 600
  26. 10
  27. 150
  28. 300
  29. 240
  30. 4
  31. 1260
  32. 60
  33. 470
  34. 4
  35. 3
  36. 650
  37. 950
  38. 1
  39. 60
  40. 1850

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