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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 951 · 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.

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  1. 1.🏋️ A force of 490 N pushes a cart 9 m along the floor. How much work is done, in joules?
  2. 2.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  3. 3.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ Pushing a crate 4 m took 360 J of work. What force was used, in newtons?
  5. 5.🏋️ Pushing a crate 3 m took 30 J of work. What force was used, in newtons?
  6. 6.🏋️ 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?
  7. 7.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A force of 390 N did 1560 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 220 N did 1760 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 2 m took 580 J of work. What force was used, in newtons?
  12. 12.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A force of 250 N did 1750 J of work. How many metres did the object move?
  14. 14.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  17. 17.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A force of 260 N did 260 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 4 m took 1360 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 440 N did 1760 J of work. How many metres did the object move?
  21. 21.🏋️ Pushing a crate 7 m took 3290 J of work. What force was used, in newtons?
  22. 22.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ Pushing a crate 1 m took 330 J of work. What force was used, in newtons?
  25. 25.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A 19 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 force of 270 N did 270 J of work. How many metres did the object move?
  28. 28.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 160 N pushes a cart 2 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Pushing a crate 5 m took 250 J of work. What force was used, in newtons?
  32. 32.🏋️ A 12 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.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  34. 34.🏋️ A force of 430 N did 430 J of work. How many metres did the object move?
  35. 35.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 280 N did 1960 J of work. How many metres did the object move?

Answer key

  1. 4410
  2. joule (J)
  3. 450
  4. 90
  5. 10
  6. 650
  7. 750
  8. 350
  9. 4
  10. 8
  11. 290
  12. 360
  13. 7
  14. 100
  15. 300
  16. less effort
  17. 240
  18. 1
  19. 340
  20. 4
  21. 470
  22. 100
  23. 110
  24. 330
  25. 2
  26. 190
  27. 1
  28. 550
  29. 360
  30. 320
  31. 50
  32. 120
  33. load ÷ effort
  34. 1
  35. 300
  36. 3
  37. 6
  38. 5
  39. 3
  40. 7

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