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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 216 · 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 390 N did 3120 J of work. How many metres did the object move?
  2. 2.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  3. 3.🏋️ A force of 340 N pushes a cart 6 m along the floor. How much work is done, in joules?
  4. 4.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  5. 5.🏋️ 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?
  6. 6.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 120 N pushes a cart 8 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 8 m took 3040 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  13. 13.🏋️ Pushing a crate 3 m took 30 J of work. What force was used, in newtons?
  14. 14.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 150 N did 450 J of work. How many metres did the object move?
  16. 16.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 250 N pushes a cart 7 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 500 N pushes a cart 8 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 140 N did 1260 J of work. How many metres did the object move?
  21. 21.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ 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)
  23. 23.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ Pushing a crate 4 m took 200 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 1 m took 140 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 9 m took 1530 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 450 N pushes a cart 8 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  34. 34.🏋️ A force of 390 N did 3510 J of work. How many metres did the object move?
  35. 35.🏋️ Pushing a crate 10 m took 2500 J of work. What force was used, in newtons?
  36. 36.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
  40. 40.🏋️ A force of 290 N pushes a cart 4 m along the floor. How much work is done, in joules?

Answer key

  1. 8
  2. through a distance
  3. 2040
  4. joule (J)
  5. 200
  6. 800
  7. 960
  8. 380
  9. 4
  10. 210
  11. 80
  12. no, work stays the same
  13. 10
  14. 3
  15. 3
  16. 300
  17. 1750
  18. 3
  19. 4000
  20. 9
  21. 4
  22. 50
  23. 6
  24. 50
  25. 250
  26. 200
  27. 50
  28. 140
  29. 170
  30. 550
  31. 1000
  32. 3600
  33. load ÷ effort
  34. 9
  35. 250
  36. 250
  37. 240
  38. 2
  39. less effort
  40. 1160

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