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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 722 · 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 430 N pushes a cart 10 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 120 N did 1200 J of work. How many metres did the object move?
  3. 3.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  4. 4.🏋️ A force of 410 N did 1230 J of work. How many metres did the object move?
  5. 5.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  6. 6.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 120 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
  11. 11.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 180 N did 180 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 60 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 390 N did 3900 J of work. How many metres did the object move?
  16. 16.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 250 N did 500 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 110 N did 550 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 60 N pushes a cart 10 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Pushing a crate 3 m took 870 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 9 m took 4410 J of work. What force was used, in newtons?
  22. 22.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 7 m took 2660 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 350 N pushes a cart 1 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  33. 33.🏋️ A force of 150 N did 150 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 270 N did 1350 J of work. How many metres did the object move?
  35. 35.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 10 N pushes a cart 5 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 40 N pushes a cart 8 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A 13 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 4300
  2. 10
  3. no, work stays the same
  4. 3
  5. joule (J)
  6. 3
  7. 4
  8. 960
  9. 3
  10. through a distance
  11. 4
  12. 1
  13. 120
  14. 650
  15. 10
  16. 550
  17. 2
  18. 5
  19. 600
  20. 290
  21. 490
  22. 720
  23. 6
  24. 6
  25. 200
  26. 450
  27. 300
  28. 2
  29. 380
  30. 750
  31. 350
  32. load ÷ effort
  33. 1
  34. 5
  35. 6
  36. 550
  37. 50
  38. 5
  39. 320
  40. 520

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