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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 924 · 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.🏋️ Pushing a crate 1 m took 400 J of work. What force was used, in newtons?
  2. 2.🏋️ Pushing a crate 2 m took 140 J of work. What force was used, in newtons?
  3. 3.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
  4. 4.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  5. 5.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ Pushing a crate 3 m took 810 J of work. What force was used, in newtons?
  7. 7.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Pushing a crate 3 m took 960 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 6 m took 600 J of work. What force was used, in newtons?
  11. 11.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  13. 13.🏋️ Pushing a crate 2 m took 500 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 380 N did 1520 J of work. How many metres did the object move?
  15. 15.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 170 N did 1190 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 140 N did 1260 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 160 N did 960 J of work. How many metres did the object move?
  22. 22.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  23. 23.🏋️ A force of 10 N did 10 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 50 N pushes a cart 3 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 480 N pushes a cart 7 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 230 N did 1840 J of work. How many metres did the object move?
  28. 28.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 260 N pushes a cart 2 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 390 N pushes a cart 5 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 420 N did 4200 J of work. How many metres did the object move?
  35. 35.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  39. 39.🏋️ Pushing a crate 9 m took 1530 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 450 N pushes a cart 2 m along the floor. How much work is done, in joules?

Answer key

  1. 400
  2. 70
  3. no, work stays the same
  4. joule (J)
  5. 200
  6. 270
  7. 100
  8. 320
  9. 3
  10. 100
  11. 700
  12. through a distance
  13. 250
  14. 4
  15. 120
  16. 150
  17. 6
  18. 300
  19. 7
  20. 9
  21. 6
  22. less effort
  23. 1
  24. 150
  25. 3360
  26. 6
  27. 8
  28. 850
  29. 150
  30. 520
  31. 10
  32. 150
  33. 1950
  34. 10
  35. 150
  36. 5
  37. 850
  38. load ÷ effort
  39. 170
  40. 900

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