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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 624 · 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 180 N pushes a cart 3 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 250 N did 1250 J of work. How many metres did the object move?
  3. 3.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A force of 390 N pushes a cart 1 m along the floor. How much work is done, in joules?
  6. 6.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  7. 7.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  8. 8.🏋️ A force of 20 N did 80 J of work. How many metres did the object move?
  9. 9.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  10. 10.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ Pushing a crate 9 m took 270 J of work. What force was used, in newtons?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 30 N did 180 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 450 N did 2700 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 370 N did 370 J of work. How many metres did the object move?
  16. 16.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ Pushing a crate 10 m took 1900 J of work. What force was used, in newtons?
  19. 19.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  25. 25.🏋️ A force of 190 N did 1330 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  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 10 m took 1800 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 290 N pushes a cart 1 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 470 N pushes a cart 4 m along the floor. How much work is done, in joules?
  31. 31.🏋️ 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)
  32. 32.🏋️ A force of 160 N pushes a cart 1 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  36. 36.🏋️ A force of 330 N did 1320 J of work. How many metres did the object move?
  37. 37.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Pushing a crate 7 m took 210 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 4 m took 1720 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 340 N pushes a cart 8 m along the floor. How much work is done, in joules?

Answer key

  1. 540
  2. 5
  3. 420
  4. 6
  5. 390
  6. joule (J)
  7. less effort
  8. 4
  9. no, work stays the same
  10. 700
  11. 30
  12. 100
  13. 6
  14. 6
  15. 1
  16. 200
  17. 6
  18. 190
  19. 850
  20. 2
  21. 3
  22. 4
  23. 300
  24. through a distance
  25. 7
  26. 6
  27. 10
  28. 180
  29. 290
  30. 1880
  31. 450
  32. 160
  33. 560
  34. 40
  35. load ÷ effort
  36. 4
  37. 550
  38. 30
  39. 430
  40. 2720

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