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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 925 · 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 force of 220 N pushes a cart 1 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  3. 3.🏋️ A force of 390 N pushes a cart 1 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ Pushing a crate 9 m took 4230 J of work. What force was used, in newtons?
  6. 6.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  8. 8.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  9. 9.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 3 m took 90 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 50 N pushes a cart 5 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 280 N pushes a cart 10 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  19. 19.🏋️ A force of 240 N pushes a cart 7 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 280 N pushes a cart 1 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 4 m took 200 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 200 N did 800 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 8 m took 2320 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 180 N did 1080 J of work. How many metres did the object move?
  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 machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Pushing a crate 4 m took 1400 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 470 N pushes a cart 8 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 260 N did 520 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 90 N did 270 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 350 N did 2100 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 20 N pushes a cart 10 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 1 m took 50 J of work. What force was used, in newtons?
  37. 37.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ 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)

Answer key

  1. 220
  2. through a distance
  3. 390
  4. 1000
  5. 470
  6. 150
  7. no, work stays the same
  8. joule (J)
  9. 4
  10. 30
  11. 5
  12. 250
  13. 300
  14. 300
  15. 350
  16. 1
  17. 2800
  18. load ÷ effort
  19. 1680
  20. 4
  21. 280
  22. 50
  23. 4
  24. 290
  25. 6
  26. 5
  27. 4
  28. 350
  29. 3760
  30. 2
  31. 3
  32. 6
  33. 200
  34. 6
  35. 3
  36. 50
  37. 50
  38. 5
  39. 350
  40. 200

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