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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 671 · 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.🏋️ Pushing a crate 10 m took 1300 J of work. What force was used, in newtons?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  3. 3.🏋️ A force of 80 N did 160 J of work. How many metres did the object move?
  4. 4.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) yes, always (d) only on Mondays
  5. 5.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  6. 6.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  7. 7.🏋️ A force of 310 N did 310 J of work. How many metres did the object move?
  8. 8.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ Pushing a crate 6 m took 1200 J of work. What force was used, in newtons?
  10. 10.🏋️ 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)
  11. 11.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 340 N pushes a cart 8 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 150 N pushes a cart 2 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 250 N did 750 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 290 N did 2030 J of work. How many metres did the object move?
  20. 20.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ Pushing a crate 6 m took 840 J of work. What force was used, in newtons?
  22. 22.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ Pushing a crate 6 m took 1680 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 100 N did 100 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 390 N did 1170 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 220 N did 660 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 470 N did 1410 J of work. How many metres did the object move?
  29. 29.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 290 N did 870 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 120 N did 480 J of work. How many metres did the object move?
  33. 33.🏋️ 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?
  34. 34.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 50 N did 300 J of work. How many metres did the object move?
  36. 36.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 140 N pushes a cart 9 m along the floor. How much work is done, in joules?
  38. 38.🏋️ 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?
  39. 39.🏋️ A force of 130 N did 780 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 370 N did 370 J of work. How many metres did the object move?

Answer key

  1. 130
  2. load ÷ effort
  3. 2
  4. no, work stays the same
  5. joule (J)
  6. through a distance
  7. 1
  8. 600
  9. 200
  10. 950
  11. 100
  12. 2720
  13. 6
  14. 300
  15. 5
  16. 700
  17. 5
  18. 3
  19. 7
  20. 3
  21. 140
  22. 20
  23. 280
  24. 1
  25. 3
  26. 2
  27. 3
  28. 3
  29. 50
  30. 700
  31. 3
  32. 4
  33. 150
  34. 1500
  35. 6
  36. 3
  37. 1260
  38. 40
  39. 6
  40. 1

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