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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 116 · 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 10 m took 1100 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 150 N pushes a cart 4 m along the floor. How much work is done, in joules?
  3. 3.🏋️ 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?
  4. 4.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
  5. 5.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  7. 7.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
  8. 8.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ Pushing a crate 10 m took 300 J of work. What force was used, in newtons?
  10. 10.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  12. 12.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 470 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 120 N did 240 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 450 N pushes a cart 7 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 350 N did 3500 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 250 N did 1750 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 410 N pushes a cart 5 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Pushing a crate 1 m took 150 J of work. What force was used, in newtons?
  21. 21.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 7 m took 140 J of work. What force was used, in newtons?
  25. 25.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Pushing a crate 6 m took 1620 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 390 N did 2340 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 450 N pushes a cart 2 m along the floor. How much work is done, in joules?
  29. 29.🏋️ 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?
  30. 30.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ 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)
  32. 32.🏋️ 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?
  33. 33.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 300 N pushes a cart 1 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 220 N pushes a cart 9 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
  39. 39.🏋️ A force of 500 N did 5000 J of work. How many metres did the object move?
  40. 40.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 110
  2. 600
  3. 10
  4. less effort
  5. 4
  6. joule (J)
  7. through a distance
  8. 510
  9. 30
  10. 5
  11. load ÷ effort
  12. 5
  13. 940
  14. 600
  15. 2
  16. 3150
  17. 10
  18. 7
  19. 2050
  20. 150
  21. 2
  22. 120
  23. 5
  24. 20
  25. 120
  26. 270
  27. 6
  28. 900
  29. 400
  30. 1000
  31. 1000
  32. 150
  33. 550
  34. 300
  35. 1980
  36. 300
  37. 900
  38. no, work stays the same
  39. 10
  40. 320

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