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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 229 · 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.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A force of 210 N pushes a cart 2 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  4. 4.🏋️ A force of 80 N did 80 J of work. How many metres did the object move?
  5. 5.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  6. 6.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
  7. 7.🏋️ A force of 250 N did 250 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 180 N pushes a cart 5 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  10. 10.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 220 N pushes a cart 6 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 450 N pushes a cart 1 m along the floor. How much work is done, in joules?
  14. 14.🏋️ 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?
  15. 15.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 290 N did 2610 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 60 N did 420 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 10 m took 1000 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 480 N did 1920 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 400 N did 1200 J of work. How many metres did the object move?
  22. 22.🏋️ Pushing a crate 9 m took 1440 J of work. What force was used, in newtons?
  23. 23.🏋️ 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?
  24. 24.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ 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)
  26. 26.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 40 N pushes a cart 3 m along the floor. How much work is done, in joules?
  28. 28.🏋️ 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)
  29. 29.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
  31. 31.🏋️ Pushing a crate 5 m took 500 J of work. What force was used, in newtons?
  32. 32.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Pushing a crate 3 m took 990 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 310 N pushes a cart 6 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 80 N pushes a cart 9 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?

Answer key

  1. 900
  2. 420
  3. load ÷ effort
  4. 1
  5. less effort
  6. through a distance
  7. 1
  8. 900
  9. no, work stays the same
  10. 6
  11. 1320
  12. 450
  13. 450
  14. 120
  15. 30
  16. 500
  17. 9
  18. 7
  19. 100
  20. 4
  21. 3
  22. 160
  23. 510
  24. 3
  25. 200
  26. 4
  27. 120
  28. 750
  29. 5
  30. joule (J)
  31. 100
  32. 2
  33. 4
  34. 330
  35. 4
  36. 3
  37. 1860
  38. 720
  39. 500
  40. 5

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