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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 267 · 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.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  3. 3.🏋️ Pushing a crate 6 m took 540 J of work. What force was used, in newtons?
  4. 4.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Pushing a crate 1 m took 40 J of work. What force was used, in newtons?
  6. 6.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  8. 8.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ 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?
  11. 11.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 380 N pushes a cart 1 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  14. 14.🏋️ Pushing a crate 2 m took 580 J of work. What force was used, in newtons?
  15. 15.🏋️ A 9 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 340 N pushes a cart 6 m along the floor. How much work is done, in joules?
  19. 19.🏋️ 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)
  20. 20.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 330 N pushes a cart 2 m along the floor. 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 force of 230 N did 460 J of work. How many metres did the object move?
  24. 24.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Pushing a crate 4 m took 320 J of work. What force was used, in newtons?
  26. 26.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 400 N pushes a cart 5 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 450 N pushes a cart 2 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 340 N did 1020 J of work. How many metres did the object move?
  32. 32.🏋️ Pushing a crate 10 m took 300 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 130 N did 260 J of work. How many metres did the object move?
  39. 39.🏋️ Pushing a crate 4 m took 1440 J of work. What force was used, in newtons?
  40. 40.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. through a distance
  2. load ÷ effort
  3. 90
  4. 6
  5. 40
  6. 6
  7. joule (J)
  8. 800
  9. 340
  10. 420
  11. 4
  12. 380
  13. no, work stays the same
  14. 290
  15. 450
  16. 300
  17. 300
  18. 2040
  19. 450
  20. 2
  21. 660
  22. 4
  23. 2
  24. 100
  25. 80
  26. 600
  27. 2000
  28. 150
  29. 900
  30. 3
  31. 3
  32. 30
  33. 150
  34. 2
  35. 1080
  36. 80
  37. 950
  38. 2
  39. 360
  40. 650

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