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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 222 · 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 100 N did 800 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 280 N pushes a cart 9 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 9 m took 3960 J of work. What force was used, in newtons?
  7. 7.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  8. 8.🏋️ A force of 70 N did 210 J of work. How many metres did the object move?
  9. 9.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  11. 11.🏋️ A force of 240 N did 480 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 280 N pushes a cart 4 m along the floor. How much work is done, in joules?
  13. 13.🏋️ 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?
  14. 14.🏋️ Pushing a crate 8 m took 2000 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 220 N did 1980 J of work. How many metres did the object move?
  16. 16.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 420 N did 1680 J of work. How many metres did the object move?
  18. 18.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ 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?
  20. 20.🏋️ Pushing a crate 1 m took 60 J of work. What force was used, in newtons?
  21. 21.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
  22. 22.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ Pushing a crate 1 m took 410 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 100 N pushes a cart 10 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  26. 26.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ 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?
  28. 28.🏋️ Pushing a crate 5 m took 1350 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ Pushing a crate 3 m took 810 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 120 N pushes a cart 3 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 90 N did 180 J of work. How many metres did the object move?
  37. 37.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  38. 38.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ Pushing a crate 9 m took 2700 J of work. What force was used, in newtons?

Answer key

  1. 8
  2. 2520
  3. 5
  4. 200
  5. 4
  6. 440
  7. joule (J)
  8. 3
  9. 650
  10. through a distance
  11. 2
  12. 1120
  13. 150
  14. 250
  15. 9
  16. 600
  17. 4
  18. 400
  19. 120
  20. 60
  21. no, work stays the same
  22. 100
  23. 410
  24. 1000
  25. less effort
  26. 700
  27. 10
  28. 270
  29. 5
  30. 270
  31. 6
  32. 360
  33. 2
  34. 2
  35. 4
  36. 2
  37. load ÷ effort
  38. 90
  39. 280
  40. 300

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