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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 853 · 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 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  4. 4.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  5. 5.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  6. 6.🏋️ Pushing a crate 9 m took 1170 J of work. What force was used, in newtons?
  7. 7.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A force of 10 N pushes a cart 5 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 90 N did 630 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 80 N pushes a cart 4 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 410 N did 2050 J of work. How many metres did the object move?
  12. 12.🏋️ Pushing a crate 2 m took 20 J of work. What force was used, in newtons?
  13. 13.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  17. 17.🏋️ A force of 460 N did 3680 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 20 N pushes a cart 4 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 360 N did 1080 J of work. How many metres did the object move?
  20. 20.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 400 N did 400 J of work. How many metres did the object move?
  23. 23.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A force of 440 N pushes a cart 4 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 1 m took 50 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 1 m took 220 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 2 m took 300 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 1 m took 310 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 130 N did 390 J of work. How many metres did the object move?
  30. 30.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 70 N pushes a cart 2 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 140 N did 280 J of work. How many metres did the object move?
  37. 37.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Pushing a crate 3 m took 1200 J of work. What force was used, in newtons?
  39. 39.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 140 N did 700 J of work. How many metres did the object move?

Answer key

  1. 10
  2. 280
  3. load ÷ effort
  4. through a distance
  5. joule (J)
  6. 130
  7. 90
  8. 50
  9. 7
  10. 320
  11. 5
  12. 10
  13. 550
  14. 100
  15. 700
  16. less effort
  17. 8
  18. 80
  19. 3
  20. 400
  21. 5
  22. 1
  23. 70
  24. 1760
  25. 50
  26. 220
  27. 150
  28. 310
  29. 3
  30. 100
  31. 240
  32. 550
  33. 4
  34. 140
  35. 280
  36. 2
  37. 200
  38. 400
  39. 5
  40. 5

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