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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 698 · 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.

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  1. 1.🏋️ A 20 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 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 220 N pushes a cart 10 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  7. 7.🏋️ A force of 180 N did 900 J of work. How many metres did the object move?
  8. 8.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A force of 30 N did 210 J of work. How many metres did the object move?
  10. 10.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) only upwards (d) without moving it
  11. 11.🏋️ 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?
  12. 12.🏋️ A force of 330 N did 2310 J of work. How many metres did the object move?
  13. 13.🏋️ Pushing a crate 10 m took 100 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 120 N pushes a cart 8 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ Pushing a crate 5 m took 1550 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 380 N did 3420 J of work. How many metres did the object move?
  21. 21.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  22. 22.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 110 N pushes a cart 3 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 310 N did 3100 J of work. How many metres did the object move?
  25. 25.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 470 N did 2820 J of work. How many metres did the object move?
  27. 27.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 1 m took 140 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 130 N did 130 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  35. 35.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 360 N pushes a cart 7 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 9 m took 1890 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 10 m took 3800 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 310 N pushes a cart 2 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 340 N did 2040 J of work. How many metres did the object move?

Answer key

  1. 200
  2. 650
  3. 3
  4. 2200
  5. 4
  6. no, work stays the same
  7. 5
  8. 50
  9. 7
  10. through a distance
  11. 380
  12. 7
  13. 10
  14. 960
  15. 4
  16. 6
  17. 250
  18. 300
  19. 310
  20. 9
  21. load ÷ effort
  22. 440
  23. 330
  24. 10
  25. 3
  26. 6
  27. 800
  28. 140
  29. 1
  30. 4
  31. 400
  32. 120
  33. 5
  34. joule (J)
  35. 270
  36. 2520
  37. 210
  38. 380
  39. 620
  40. 6

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