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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 759 · 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 160 N did 960 J of work. How many metres did the object move?
  2. 2.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Pushing a crate 4 m took 1200 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 450 N pushes a cart 10 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 230 N pushes a cart 2 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 120 N did 840 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 480 N did 3360 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 100 N did 400 J of work. How many metres did the object move?
  15. 15.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
  16. 16.🏋️ A force of 200 N pushes a cart 4 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 10 N did 60 J of work. How many metres did the object move?
  18. 18.🏋️ Pushing a crate 9 m took 3870 J of work. What force was used, in newtons?
  19. 19.🏋️ Pushing a crate 4 m took 1160 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 450 N pushes a cart 7 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 110 N pushes a cart 1 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 1 m took 40 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 310 N did 3100 J of work. How many metres did the object move?
  28. 28.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  29. 29.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  30. 30.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 320 N pushes a cart 2 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 270 N did 540 J of work. How many metres did the object move?
  34. 34.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ Pushing a crate 4 m took 1120 J of work. What force was used, in newtons?
  36. 36.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  38. 38.🏋️ A force of 320 N pushes a cart 9 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?

Answer key

  1. 6
  2. 5
  3. 60
  4. 2
  5. 1260
  6. 2
  7. 300
  8. 4500
  9. 4
  10. 460
  11. 650
  12. 7
  13. 7
  14. 4
  15. less effort
  16. 800
  17. 6
  18. 430
  19. 290
  20. 3150
  21. 100
  22. 4
  23. 3
  24. 1000
  25. 110
  26. 40
  27. 10
  28. load ÷ effort
  29. through a distance
  30. 2
  31. 2
  32. 640
  33. 2
  34. 700
  35. 280
  36. 350
  37. joule (J)
  38. 2880
  39. 400
  40. 4

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