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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 861 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
  3. 3.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  4. 4.🏋️ A force of 310 N pushes a cart 7 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 150 N did 150 J of work. How many metres did the object move?
  6. 6.🏋️ 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?
  7. 7.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 290 N did 2900 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 1 m took 60 J of work. What force was used, in newtons?
  12. 12.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ Pushing a crate 4 m took 840 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 400 N pushes a cart 5 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
  17. 17.🏋️ Pushing a crate 7 m took 1190 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 180 N pushes a cart 1 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  20. 20.🏋️ Pushing a crate 3 m took 480 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 450 N pushes a cart 10 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Pushing a crate 7 m took 140 J of work. What force was used, in newtons?
  24. 24.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 290 N pushes a cart 5 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 180 N pushes a cart 4 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 10 N pushes a cart 6 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A 4 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.🏋️ Pushing a crate 7 m took 2310 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 30 N did 30 J of work. How many metres did the object move?
  32. 32.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ Pushing a crate 5 m took 1500 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 6 m took 600 J of work. What force was used, in newtons?
  39. 39.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 270
  2. joule (J)
  3. less effort
  4. 2170
  5. 1
  6. 50
  7. 150
  8. 3
  9. 900
  10. 10
  11. 60
  12. 3
  13. 40
  14. 210
  15. 2000
  16. through a distance
  17. 170
  18. 180
  19. load ÷ effort
  20. 160
  21. 4500
  22. 5
  23. 20
  24. 550
  25. 1450
  26. 720
  27. 60
  28. 650
  29. 160
  30. 330
  31. 1
  32. 850
  33. 5
  34. 2
  35. 300
  36. 5
  37. 2
  38. 100
  39. 3
  40. 350

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