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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 656 · 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 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?
  2. 2.🏋️ A force of 300 N pushes a cart 4 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 10 N did 50 J of work. How many metres did the object move?
  4. 4.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  5. 5.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 7 m took 2520 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 330 N pushes a cart 9 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 100 N pushes a cart 3 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 4 m took 160 J of work. What force was used, in newtons?
  10. 10.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  13. 13.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ Pushing a crate 2 m took 980 J of work. What force was used, in newtons?
  15. 15.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 210 N pushes a cart 2 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  18. 18.🏋️ Pushing a crate 6 m took 1740 J of work. What force was used, in newtons?
  19. 19.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 100 N did 800 J of work. How many metres did the object move?
  23. 23.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  24. 24.🏋️ 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?
  25. 25.🏋️ A force of 20 N pushes a cart 6 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  28. 28.🏋️ Pushing a crate 6 m took 360 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 350 N pushes a cart 5 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Pushing a crate 5 m took 1850 J of work. What force was used, in newtons?
  32. 32.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A force of 380 N did 1140 J of work. How many metres did the object move?
  34. 34.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 100 N did 500 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 3 m took 600 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 4 m took 760 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 3 m took 210 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 4 m took 400 J of work. What force was used, in newtons?
  40. 40.🏋️ A 10 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. 130
  2. 1200
  3. 5
  4. joule (J)
  5. 2
  6. 360
  7. 2970
  8. 300
  9. 40
  10. 100
  11. 3
  12. through a distance
  13. 640
  14. 490
  15. 6
  16. 420
  17. no, work stays the same
  18. 290
  19. 350
  20. 4
  21. 5
  22. 8
  23. less effort
  24. 160
  25. 120
  26. 200
  27. load ÷ effort
  28. 60
  29. 3
  30. 1750
  31. 370
  32. 100
  33. 3
  34. 300
  35. 5
  36. 200
  37. 190
  38. 70
  39. 100
  40. 400

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