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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 543 · 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.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  2. 2.🏋️ Pushing a crate 6 m took 1500 J of work. What force was used, in newtons?
  3. 3.🏋️ Pushing a crate 7 m took 2100 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 450 N pushes a cart 8 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Pushing a crate 5 m took 250 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 200 N pushes a cart 2 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 140 N pushes a cart 5 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 10 m took 2400 J of work. What force was used, in newtons?
  10. 10.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  11. 11.🏋️ A force of 380 N did 760 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 260 N did 260 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 60 N did 60 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 380 N pushes a cart 9 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ Pushing a crate 5 m took 150 J of work. What force was used, in newtons?
  18. 18.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 80 N did 800 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 390 N pushes a cart 7 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
  22. 22.🏋️ 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)
  23. 23.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 30 N did 210 J of work. How many metres did the object move?
  25. 25.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  26. 26.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 60 N pushes a cart 3 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 3 m took 780 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 380 N pushes a cart 10 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 340 N pushes a cart 4 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 410 N pushes a cart 3 m along the floor. How much work is done, in joules?
  34. 34.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ Pushing a crate 1 m took 160 J of work. What force was used, in newtons?
  38. 38.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?

Answer key

  1. joule (J)
  2. 250
  3. 300
  4. 3600
  5. 50
  6. 400
  7. 700
  8. 2
  9. 240
  10. through a distance
  11. 2
  12. 1
  13. 1
  14. 3420
  15. 350
  16. 900
  17. 30
  18. 70
  19. 10
  20. 2730
  21. less effort
  22. 450
  23. 4
  24. 7
  25. load ÷ effort
  26. 5
  27. 200
  28. 180
  29. 260
  30. 3800
  31. 1000
  32. 1360
  33. 1230
  34. 360
  35. 850
  36. 650
  37. 160
  38. 700
  39. 1000
  40. 4

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