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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 474 · 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 4 m took 400 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 360 N did 1800 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 20 N pushes a cart 1 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  5. 5.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  8. 8.🏋️ A force of 290 N pushes a cart 5 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 330 N did 660 J of work. How many metres did the object move?
  10. 10.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
  11. 11.🏋️ A force of 150 N pushes a cart 10 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 170 N pushes a cart 8 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 330 N did 990 J of work. How many metres did the object move?
  14. 14.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 370 N did 370 J of work. How many metres did the object move?
  17. 17.🏋️ Pushing a crate 1 m took 50 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 70 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  20. 20.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 440 N did 440 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 420 N did 3780 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 370 N did 3330 J of work. How many metres did the object move?
  28. 28.🏋️ A 17 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 40 N pushes a cart 9 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  35. 35.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 210 N did 210 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 300 N did 600 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 470 N pushes a cart 7 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 130 N did 130 J of work. How many metres did the object move?

Answer key

  1. 100
  2. 5
  3. 20
  4. no, work stays the same
  5. 4
  6. 3
  7. through a distance
  8. 1450
  9. 2
  10. less effort
  11. 1500
  12. 1360
  13. 3
  14. 6
  15. 900
  16. 1
  17. 50
  18. 140
  19. joule (J)
  20. 50
  21. 700
  22. 5
  23. 300
  24. 1
  25. 1500
  26. 9
  27. 9
  28. 680
  29. 650
  30. 360
  31. 200
  32. 500
  33. 850
  34. load ÷ effort
  35. 50
  36. 1
  37. 2
  38. 3
  39. 3290
  40. 1

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