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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 846 · 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.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  2. 2.🏋️ A force of 410 N pushes a cart 1 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 70 N pushes a cart 7 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Pushing a crate 2 m took 900 J of work. What force was used, in newtons?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  7. 7.🏋️ Pushing a crate 3 m took 1050 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 120 N pushes a cart 10 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  10. 10.🏋️ Pushing a crate 6 m took 120 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 390 N did 3900 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 100 N did 800 J of work. How many metres did the object move?
  13. 13.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 110 N pushes a cart 5 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  16. 16.🏋️ A force of 290 N did 870 J of work. How many metres did the object move?
  17. 17.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
  18. 18.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 300 N did 2100 J of work. How many metres did the object move?
  20. 20.🏋️ 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?
  21. 21.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 170 N did 850 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 10 m took 4400 J of work. What force was used, in newtons?
  25. 25.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Pushing a crate 10 m took 1300 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 370 N did 2960 J of work. How many metres did the object move?
  28. 28.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 150 N pushes a cart 8 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 1 m took 200 J of work. What force was used, in newtons?
  34. 34.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ Pushing a crate 8 m took 800 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 130 N did 1170 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 6 m took 720 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 50 N pushes a cart 3 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 8 m took 3200 J of work. What force was used, in newtons?

Answer key

  1. joule (J)
  2. 410
  3. 380
  4. 490
  5. 450
  6. load ÷ effort
  7. 350
  8. 1200
  9. through a distance
  10. 20
  11. 10
  12. 8
  13. 50
  14. 550
  15. less effort
  16. 3
  17. no, work stays the same
  18. 5
  19. 7
  20. 10
  21. 400
  22. 5
  23. 6
  24. 440
  25. 160
  26. 130
  27. 8
  28. 500
  29. 950
  30. 5
  31. 450
  32. 1200
  33. 200
  34. 6
  35. 100
  36. 5
  37. 9
  38. 120
  39. 150
  40. 400

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