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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 692 · 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 smooth ramp is 5 m long and rises 1 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  3. 3.🏋️ Pushing a crate 5 m took 1600 J of work. What force was used, in newtons?
  4. 4.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  7. 7.🏋️ A force of 250 N pushes a cart 9 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 2 m took 220 J of work. What force was used, in newtons?
  9. 9.🏋️ 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?
  10. 10.🏋️ 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?
  11. 11.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  14. 14.🏋️ A 6 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 force of 380 N pushes a cart 3 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 500 N pushes a cart 7 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 90 N pushes a cart 5 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  23. 23.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 80 N did 560 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 6 m took 600 J of work. What force was used, in newtons?
  27. 27.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 420 N pushes a cart 6 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 320 N pushes a cart 8 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 5 m took 800 J of work. What force was used, in newtons?
  35. 35.🏋️ A 19 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 10 m long and rises 2 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ Pushing a crate 7 m took 210 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 440 N pushes a cart 9 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 9 m took 3690 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?

Answer key

  1. 850
  2. no, work stays the same
  3. 320
  4. 400
  5. 450
  6. through a distance
  7. 2250
  8. 110
  9. 170
  10. 850
  11. 3
  12. 250
  13. joule (J)
  14. 120
  15. 1140
  16. 3500
  17. 210
  18. 100
  19. 650
  20. 4
  21. 450
  22. load ÷ effort
  23. 650
  24. 7
  25. 600
  26. 100
  27. 600
  28. 150
  29. 3
  30. 3
  31. 4
  32. 2520
  33. 2560
  34. 160
  35. 950
  36. 1000
  37. 30
  38. 3960
  39. 410
  40. 6

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