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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 514 · 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 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 160 N did 160 J of work. How many metres did the object move?
  4. 4.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  5. 5.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  7. 7.🏋️ A force of 160 N pushes a cart 9 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 10 m took 2200 J of work. What force was used, in newtons?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A force of 120 N pushes a cart 2 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Pushing a crate 10 m took 300 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 270 N pushes a cart 9 m along the floor. How much work is done, in joules?
  14. 14.🏋️ 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)
  15. 15.🏋️ Pushing a crate 3 m took 600 J of work. What force was used, in newtons?
  16. 16.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 220 N did 880 J of work. How many metres did the object move?
  18. 18.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
  19. 19.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 380 N did 1520 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 60 N did 360 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 340 N pushes a cart 4 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A 1 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 machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 190 N did 1900 J of work. How many metres did the object move?
  29. 29.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 130 N pushes a cart 10 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 9 m took 3330 J of work. What force was used, in newtons?
  33. 33.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ Pushing a crate 10 m took 4500 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 110 N did 990 J of work. How many metres did the object move?
  37. 37.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 180 N pushes a cart 9 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ Pushing a crate 4 m took 1880 J of work. What force was used, in newtons?

Answer key

  1. 2
  2. 3
  3. 1
  4. joule (J)
  5. 5
  6. through a distance
  7. 1440
  8. 220
  9. 750
  10. 1000
  11. 240
  12. 30
  13. 2430
  14. 300
  15. 200
  16. 150
  17. 4
  18. load ÷ effort
  19. 150
  20. 4
  21. 4
  22. 6
  23. 6
  24. 1360
  25. 2
  26. 50
  27. 2
  28. 10
  29. 120
  30. 1300
  31. 5
  32. 370
  33. 3
  34. 550
  35. 450
  36. 9
  37. 5
  38. 1620
  39. 200
  40. 470

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