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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 135 · 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 80 N pushes a cart 2 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 310 N pushes a cart 10 m along the floor. How much work is done, in joules?
  3. 3.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  4. 4.🏋️ A force of 390 N did 390 J of work. How many metres did the object move?
  5. 5.🏋️ Pushing a crate 4 m took 40 J of work. What force was used, in newtons?
  6. 6.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  7. 7.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 480 N pushes a cart 7 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 40 N did 120 J of work. How many metres did the object move?
  10. 10.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  12. 12.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 90 N pushes a cart 2 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 290 N did 2610 J of work. How many metres did the object move?
  16. 16.🏋️ Pushing a crate 7 m took 1470 J of work. What force was used, in newtons?
  17. 17.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ Pushing a crate 4 m took 960 J of work. What force was used, in newtons?
  19. 19.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A force of 380 N pushes a cart 1 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 450 N did 1800 J of work. How many metres did the object move?
  22. 22.🏋️ Pushing a crate 1 m took 230 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 350 N pushes a cart 10 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 7 m took 700 J of work. What force was used, in newtons?
  26. 26.🏋️ 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?
  27. 27.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  30. 30.🏋️ Pushing a crate 6 m took 1740 J of work. What force was used, in newtons?
  31. 31.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 20 N pushes a cart 9 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 30 N pushes a cart 7 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  38. 38.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A force of 60 N did 240 J of work. How many metres did the object move?
  40. 40.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?

Answer key

  1. 160
  2. 3100
  3. joule (J)
  4. 1
  5. 10
  6. no, work stays the same
  7. 600
  8. 3360
  9. 3
  10. 850
  11. less effort
  12. 300
  13. 550
  14. 180
  15. 9
  16. 210
  17. 4
  18. 240
  19. 220
  20. 380
  21. 4
  22. 230
  23. 5
  24. 3500
  25. 100
  26. 680
  27. 3
  28. 150
  29. through a distance
  30. 290
  31. 510
  32. 2
  33. 180
  34. 210
  35. 350
  36. 500
  37. load ÷ effort
  38. 360
  39. 4
  40. 5

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