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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 170 · 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.🏋️ A force of 80 N did 720 J of work. How many metres did the object move?
  2. 2.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  4. 4.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 100 N pushes a cart 2 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  10. 10.🏋️ Pushing a crate 9 m took 2430 J of work. What force was used, in newtons?
  11. 11.🏋️ Pushing a crate 8 m took 3200 J of work. What force was used, in newtons?
  12. 12.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ Pushing a crate 4 m took 280 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 120 N pushes a cart 1 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 8 m took 3520 J of work. What force was used, in newtons?
  16. 16.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Pushing a crate 3 m took 600 J of work. What force was used, in newtons?
  18. 18.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 460 N did 1840 J of work. How many metres did the object move?
  20. 20.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  22. 22.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 350 N pushes a cart 7 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 10 m took 1100 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 250 N did 2500 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 100 N did 200 J of work. How many metres did the object move?
  29. 29.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 40 N pushes a cart 3 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 30 N pushes a cart 6 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 50 N pushes a cart 10 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  35. 35.🏋️ A force of 370 N pushes a cart 4 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
  39. 39.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 9
  2. 850
  3. joule (J)
  4. 500
  5. 200
  6. 300
  7. 5
  8. 4
  9. less effort
  10. 270
  11. 400
  12. 550
  13. 70
  14. 120
  15. 440
  16. 3
  17. 200
  18. 950
  19. 4
  20. 450
  21. no, work stays the same
  22. 5
  23. 2450
  24. 110
  25. 10
  26. 4
  27. 5
  28. 2
  29. 3
  30. 120
  31. 180
  32. 500
  33. 570
  34. load ÷ effort
  35. 1480
  36. 900
  37. 800
  38. through a distance
  39. 150
  40. 750

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