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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 812 · 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 220 N did 1760 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 440 N pushes a cart 7 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 180 N pushes a cart 5 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 240 N did 2160 J of work. How many metres did the object move?
  5. 5.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 9 m took 2250 J of work. What force was used, in newtons?
  7. 7.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  11. 11.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 290 N pushes a cart 10 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 60 N did 600 J of work. How many metres did the object move?
  15. 15.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ 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
  17. 17.🏋️ Pushing a crate 2 m took 540 J of work. What force was used, in newtons?
  18. 18.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
  19. 19.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ Pushing a crate 2 m took 80 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 210 N pushes a cart 9 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
  25. 25.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ Pushing a crate 1 m took 80 J of work. What force was used, in newtons?
  28. 28.🏋️ 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?
  29. 29.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  31. 31.🏋️ A force of 40 N did 40 J of work. How many metres did the object move?
  32. 32.🏋️ 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)
  33. 33.🏋️ A 15 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.🏋️ Pushing a crate 10 m took 4900 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 180 N did 540 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 3 m took 390 J of work. What force was used, in newtons?
  37. 37.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 140 N pushes a cart 7 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 500 N did 2500 J of work. How many metres did the object move?

Answer key

  1. 8
  2. 3080
  3. 900
  4. 9
  5. 5
  6. 250
  7. 140
  8. 2
  9. 50
  10. through a distance
  11. 550
  12. 2900
  13. 5
  14. 10
  15. 400
  16. no, work stays the same
  17. 270
  18. less effort
  19. 5
  20. 6
  21. 40
  22. 1890
  23. 6
  24. joule (J)
  25. 400
  26. 100
  27. 80
  28. 200
  29. 600
  30. load ÷ effort
  31. 1
  32. 850
  33. 600
  34. 490
  35. 3
  36. 130
  37. 1000
  38. 650
  39. 980
  40. 5

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