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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 301 · 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 1 m took 490 J of work. What force was used, in newtons?
  2. 2.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Pushing a crate 1 m took 340 J of work. What force was used, in newtons?
  5. 5.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
  7. 7.🏋️ A force of 110 N pushes a cart 5 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 1 m took 230 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ 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?
  13. 13.🏋️ Pushing a crate 3 m took 840 J of work. What force was used, in newtons?
  14. 14.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ Pushing a crate 5 m took 150 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 100 N did 400 J of work. How many metres did the object move?
  17. 17.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ Pushing a crate 6 m took 1620 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 300 N did 1500 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 240 N did 1200 J of work. How many metres did the object move?
  21. 21.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  22. 22.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 200 N did 1000 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 70 N pushes a cart 10 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 230 N pushes a cart 8 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 10 m took 2100 J of work. What force was used, in newtons?
  29. 29.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  30. 30.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  32. 32.🏋️ A force of 250 N pushes a cart 7 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 70 N did 140 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 50 N pushes a cart 10 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 160 N pushes a cart 1 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 130 N pushes a cart 10 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  40. 40.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?

Answer key

  1. 490
  2. 110
  3. 3
  4. 340
  5. 80
  6. joule (J)
  7. 550
  8. 230
  9. 5
  10. 4
  11. 600
  12. 120
  13. 280
  14. 2
  15. 30
  16. 4
  17. 3
  18. 270
  19. 5
  20. 5
  21. less effort
  22. 5
  23. 300
  24. 150
  25. 5
  26. 700
  27. 1840
  28. 210
  29. through a distance
  30. 160
  31. no, work stays the same
  32. 1750
  33. 2
  34. 500
  35. 160
  36. 100
  37. 3
  38. 1300
  39. load ÷ effort
  40. 2

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