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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 202 · 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 longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
  2. 2.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  4. 4.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  5. 5.🏋️ A force of 70 N pushes a cart 9 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A 13 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 230 N did 1150 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 410 N pushes a cart 6 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  10. 10.🏋️ Pushing a crate 6 m took 2340 J of work. What force was used, in newtons?
  11. 11.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 20 N did 120 J of work. How many metres did the object move?
  13. 13.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  15. 15.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ Pushing a crate 6 m took 1260 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 290 N did 580 J of work. How many metres did the object move?
  20. 20.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 280 N pushes a cart 7 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 150 N pushes a cart 2 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 100 N did 200 J of work. How many metres did the object move?
  28. 28.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 390 N pushes a cart 1 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 6 m took 840 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 260 N pushes a cart 10 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 110 N did 990 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 220 N pushes a cart 7 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 8 m took 80 J of work. What force was used, in newtons?
  35. 35.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 450 N did 2700 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 60 N pushes a cart 7 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Pushing a crate 1 m took 260 J of work. What force was used, in newtons?
  39. 39.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?

Answer key

  1. less effort
  2. 440
  3. no, work stays the same
  4. through a distance
  5. 630
  6. 520
  7. 5
  8. 2460
  9. load ÷ effort
  10. 390
  11. 300
  12. 6
  13. 400
  14. joule (J)
  15. 2
  16. 3
  17. 6
  18. 210
  19. 2
  20. 1000
  21. 850
  22. 200
  23. 1960
  24. 300
  25. 900
  26. 850
  27. 2
  28. 4
  29. 390
  30. 140
  31. 2600
  32. 9
  33. 1540
  34. 10
  35. 800
  36. 6
  37. 420
  38. 260
  39. 2
  40. 4

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