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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 983 · 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.🏋️ 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
  2. 2.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  5. 5.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 1 m took 200 J of work. What force was used, in newtons?
  7. 7.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Pushing a crate 8 m took 2880 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 480 N did 1920 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 2 m took 340 J of work. What force was used, in newtons?
  12. 12.🏋️ Pushing a crate 10 m took 4200 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 190 N pushes a cart 3 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 120 N did 1080 J of work. How many metres did the object move?
  15. 15.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 280 N pushes a cart 3 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 120 N did 240 J of work. How many metres did the object move?
  19. 19.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  20. 20.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 120 N pushes a cart 2 m along the floor. How much work is done, in joules?
  22. 22.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
  23. 23.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Pushing a crate 3 m took 330 J of work. What force was used, in newtons?
  25. 25.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 290 N pushes a cart 4 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 350 N did 350 J of work. How many metres did the object move?
  32. 32.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  33. 33.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ Pushing a crate 8 m took 880 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 210 N did 1260 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 9 m took 1260 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 280 N pushes a cart 8 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 370 N pushes a cart 4 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ Pushing a crate 2 m took 740 J of work. What force was used, in newtons?

Answer key

  1. no, work stays the same
  2. 900
  3. 5
  4. through a distance
  5. 3
  6. 200
  7. 180
  8. 650
  9. 360
  10. 4
  11. 170
  12. 420
  13. 570
  14. 9
  15. 350
  16. 5
  17. 840
  18. 2
  19. less effort
  20. 300
  21. 240
  22. joule (J)
  23. 200
  24. 110
  25. 2
  26. 30
  27. 1160
  28. 3
  29. 700
  30. 4
  31. 1
  32. load ÷ effort
  33. 180
  34. 110
  35. 6
  36. 140
  37. 2240
  38. 1480
  39. 1000
  40. 370

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