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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 429 · 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 2 m took 200 J of work. What force was used, in newtons?
  2. 2.🏋️ Pushing a crate 3 m took 810 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 220 N pushes a cart 10 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Pushing a crate 2 m took 320 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 340 N did 1360 J of work. How many metres did the object move?
  6. 6.🏋️ 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)
  7. 7.🏋️ A force of 260 N did 520 J of work. How many metres did the object move?
  8. 8.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  9. 9.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  10. 10.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?
  12. 12.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 210 N pushes a cart 10 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 20 N did 140 J of work. How many metres did the object move?
  17. 17.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  18. 18.🏋️ A force of 280 N pushes a cart 10 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  22. 22.🏋️ An 18 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.🏋️ 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?
  24. 24.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Pushing a crate 3 m took 1200 J of work. What force was used, in newtons?
  26. 26.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 6 m took 2340 J of work. What force was used, in newtons?
  30. 30.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  31. 31.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 140 N did 1260 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 430 N pushes a cart 2 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 310 N did 2480 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 70 N pushes a cart 8 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Pushing a crate 6 m took 2460 J of work. What force was used, in newtons?
  39. 39.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ Pushing a crate 4 m took 960 J of work. What force was used, in newtons?

Answer key

  1. 100
  2. 270
  3. 2200
  4. 160
  5. 4
  6. 100
  7. 2
  8. load ÷ effort
  9. less effort
  10. 5
  11. 1
  12. 5
  13. 2100
  14. 90
  15. 3
  16. 7
  17. through a distance
  18. 2800
  19. 1000
  20. 4
  21. joule (J)
  22. 360
  23. 400
  24. 200
  25. 400
  26. 5
  27. 350
  28. 3
  29. 390
  30. no, work stays the same
  31. 800
  32. 9
  33. 860
  34. 340
  35. 150
  36. 8
  37. 560
  38. 410
  39. 80
  40. 240

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