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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 851 · 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 200 N pushes a cart 3 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  3. 3.🏋️ Pushing a crate 10 m took 900 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 460 N did 2760 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 310 N pushes a cart 4 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 500 N did 1500 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 410 N pushes a cart 2 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 490 N pushes a cart 8 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Pushing a crate 10 m took 3700 J of work. What force was used, in newtons?
  13. 13.🏋️ 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)
  14. 14.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  15. 15.🏋️ A force of 160 N pushes a cart 8 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  17. 17.🏋️ A force of 430 N pushes a cart 9 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 3 m took 870 J of work. What force was used, in newtons?
  19. 19.🏋️ Pushing a crate 10 m took 2600 J of work. What force was used, in newtons?
  20. 20.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  23. 23.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 440 N did 3960 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 270 N pushes a cart 5 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A 17 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.🏋️ Pushing a crate 5 m took 450 J of work. What force was used, in newtons?
  28. 28.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  31. 31.🏋️ 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?
  32. 32.🏋️ A force of 110 N pushes a cart 7 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 1 m took 150 J of work. What force was used, in newtons?
  37. 37.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ Pushing a crate 10 m took 100 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?

Answer key

  1. 600
  2. less effort
  3. 90
  4. 6
  5. 1240
  6. 3
  7. 820
  8. 150
  9. 250
  10. 3920
  11. 50
  12. 370
  13. 100
  14. through a distance
  15. 1280
  16. no, work stays the same
  17. 3870
  18. 290
  19. 260
  20. 550
  21. 160
  22. load ÷ effort
  23. 3
  24. 9
  25. 1350
  26. 170
  27. 90
  28. 420
  29. 4
  30. joule (J)
  31. 800
  32. 770
  33. 700
  34. 5
  35. 5
  36. 150
  37. 350
  38. 250
  39. 10
  40. 3

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