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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 217 · 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 4 m took 440 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 170 N pushes a cart 5 m along the floor. How much work is done, in joules?
  3. 3.🏋️ 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
  4. 4.🏋️ Pushing a crate 6 m took 360 J of work. What force was used, in newtons?
  5. 5.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  7. 7.🏋️ A force of 450 N did 4050 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 260 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 290 N pushes a cart 7 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 90 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 340 N did 3060 J of work. How many metres did the object move?
  15. 15.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  16. 16.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 110 N did 770 J of work. How many metres did the object move?
  18. 18.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  20. 20.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ 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?
  22. 22.🏋️ Pushing a crate 3 m took 480 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ 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)
  25. 25.🏋️ Pushing a crate 4 m took 1720 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 9 m took 1080 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 400 N pushes a cart 9 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 90 N pushes a cart 6 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
  30. 30.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  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 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Pushing a crate 5 m took 2450 J of work. What force was used, in newtons?
  37. 37.🏋️ 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?
  38. 38.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Pushing a crate 5 m took 1100 J of work. What force was used, in newtons?
  40. 40.🏋️ 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?

Answer key

  1. 110
  2. 850
  3. no, work stays the same
  4. 60
  5. 3
  6. through a distance
  7. 9
  8. 2080
  9. 450
  10. 4
  11. 2030
  12. 100
  13. 180
  14. 9
  15. joule (J)
  16. 5
  17. 7
  18. 200
  19. load ÷ effort
  20. 2
  21. 380
  22. 160
  23. 5
  24. 950
  25. 430
  26. 120
  27. 3600
  28. 540
  29. less effort
  30. 300
  31. 350
  32. 120
  33. 20
  34. 5
  35. 1000
  36. 490
  37. 50
  38. 5
  39. 220
  40. 10

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