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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 970 · 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 machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 150 N pushes a cart 6 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) metre (m) (d) watt hour
  5. 5.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 70 N pushes a cart 5 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 120 N did 480 J of work. How many metres did the object move?
  8. 8.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 290 N did 1450 J of work. How many metres did the object move?
  11. 11.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 110 N did 880 J of work. How many metres did the object move?
  15. 15.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ Pushing a crate 5 m took 1500 J of work. What force was used, in newtons?
  17. 17.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  19. 19.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 460 N pushes a cart 4 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 90 N pushes a cart 1 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 10 N did 60 J of work. How many metres did the object move?
  24. 24.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
  25. 25.🏋️ A force of 360 N did 1440 J of work. How many metres did the object move?
  26. 26.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  27. 27.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  28. 28.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ Pushing a crate 7 m took 1050 J of work. What force was used, in newtons?
  30. 30.🏋️ 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?
  31. 31.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 9 m took 1440 J of work. What force was used, in newtons?
  33. 33.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ Pushing a crate 8 m took 2480 J of work. What force was used, in newtons?
  35. 35.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 300 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 280 N did 2800 J of work. How many metres did the object move?
  38. 38.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A force of 360 N did 360 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 470 N did 2820 J of work. How many metres did the object move?

Answer key

  1. 6
  2. 900
  3. 3
  4. joule (J)
  5. 750
  6. 350
  7. 4
  8. 800
  9. 6
  10. 5
  11. 750
  12. 4
  13. 800
  14. 8
  15. 60
  16. 300
  17. 3
  18. through a distance
  19. 2
  20. 1840
  21. 90
  22. 950
  23. 6
  24. less effort
  25. 4
  26. no, work stays the same
  27. load ÷ effort
  28. 160
  29. 150
  30. 10
  31. 5
  32. 160
  33. 200
  34. 310
  35. 50
  36. 900
  37. 10
  38. 240
  39. 1
  40. 6

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