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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 58 · 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 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?
  2. 2.🏋️ Pushing a crate 3 m took 120 J of work. What force was used, in newtons?
  3. 3.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  4. 4.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  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 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A 2 kg box is lifted straight up by 2 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 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 50 N did 150 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 10 N did 30 J of work. How many metres did the object move?
  11. 11.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A force of 30 N did 120 J of work. How many metres did the object move?
  13. 13.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 310 N did 930 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 420 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  17. 17.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ Pushing a crate 8 m took 3920 J of work. What force was used, in newtons?
  19. 19.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 220 N did 2200 J of work. How many metres did the object move?
  22. 22.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 360 N did 2880 J of work. How many metres did the object move?
  26. 26.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 5 m took 1550 J of work. What force was used, in newtons?
  29. 29.🏋️ A 20 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 3 m took 660 J of work. What force was used, in newtons?
  31. 31.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
  32. 32.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ Pushing a crate 1 m took 500 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 410 N pushes a cart 7 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 280 N pushes a cart 3 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 8 m took 2720 J of work. What force was used, in newtons?
  40. 40.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 70
  2. 40
  3. joule (J)
  4. 750
  5. 40
  6. 4
  7. 40
  8. 20
  9. 3
  10. 3
  11. 120
  12. 4
  13. 4
  14. 3
  15. 840
  16. less effort
  17. 2
  18. 490
  19. 2
  20. 1080
  21. 10
  22. 950
  23. 3
  24. 3
  25. 8
  26. 250
  27. 900
  28. 310
  29. 800
  30. 220
  31. load ÷ effort
  32. 140
  33. 130
  34. 500
  35. 2870
  36. 300
  37. 5
  38. 840
  39. 340
  40. 1000

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