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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 554 · 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 machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ Pushing a crate 3 m took 810 J of work. What force was used, in newtons?
  3. 3.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  4. 4.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  5. 5.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  7. 7.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ 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?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 160 N pushes a cart 7 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 120 N did 1200 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 100 N pushes a cart 7 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 40 N pushes a cart 3 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  18. 18.🏋️ A force of 230 N did 1840 J of work. How many metres did the object move?
  19. 19.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A force of 470 N did 3760 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 290 N did 2320 J of work. How many metres did the object move?
  26. 26.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 440 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 370 N pushes a cart 9 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 390 N pushes a cart 4 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 410 N did 2460 J of work. How many metres did the object move?
  32. 32.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 340 N pushes a cart 3 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 190 N did 380 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 110 N did 660 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 2 m took 640 J of work. What force was used, in newtons?
  37. 37.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 320 N did 2560 J of work. How many metres did the object move?
  39. 39.🏋️ 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?
  40. 40.🏋️ A force of 420 N did 2940 J of work. How many metres did the object move?

Answer key

  1. 5
  2. 270
  3. joule (J)
  4. less effort
  5. 350
  6. load ÷ effort
  7. 700
  8. 60
  9. 250
  10. 5
  11. 1120
  12. 450
  13. 160
  14. 10
  15. 700
  16. 120
  17. through a distance
  18. 8
  19. 4
  20. 800
  21. 450
  22. 2
  23. 280
  24. 8
  25. 8
  26. 1000
  27. 440
  28. 3330
  29. 6
  30. 1560
  31. 6
  32. 4
  33. 1020
  34. 2
  35. 6
  36. 320
  37. 900
  38. 8
  39. 150
  40. 7

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