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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 689 · 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) no effort (b) the same effort (c) more effort (d) less effort
  2. 2.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 60 N pushes a cart 9 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 10 N pushes a cart 9 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 420 N did 420 J of work. How many metres did the object move?
  6. 6.🏋️ Pushing a crate 8 m took 3040 J of work. What force was used, in newtons?
  7. 7.🏋️ Pushing a crate 10 m took 2700 J of work. What force was used, in newtons?
  8. 8.🏋️ Pushing a crate 1 m took 30 J of work. What force was used, in newtons?
  9. 9.🏋️ A force of 100 N did 500 J of work. How many metres did the object move?
  10. 10.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  11. 11.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  12. 12.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) yes, always (d) only on Mondays
  13. 13.🏋️ A force of 90 N pushes a cart 9 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 1 m took 360 J of work. What force was used, in newtons?
  15. 15.🏋️ A 2 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 3 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 100 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ 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)
  20. 20.🏋️ A force of 410 N pushes a cart 8 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 340 N pushes a cart 6 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 170 N pushes a cart 5 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 450 N pushes a cart 3 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 1 m took 280 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 260 N pushes a cart 9 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 490 N pushes a cart 10 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 10 N pushes a cart 6 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 250 N pushes a cart 2 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 10 m took 4200 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 370 N did 740 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 410 N did 1640 J of work. How many metres did the object move?
  33. 33.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 310 N pushes a cart 4 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Pushing a crate 2 m took 100 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 2 m took 760 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 210 N did 210 J of work. How many metres did the object move?
  39. 39.🏋️ Pushing a crate 5 m took 1450 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?

Answer key

  1. less effort
  2. 120
  3. 540
  4. 90
  5. 1
  6. 380
  7. 270
  8. 30
  9. 5
  10. through a distance
  11. joule (J)
  12. no, work stays the same
  13. 810
  14. 360
  15. 40
  16. 900
  17. 200
  18. 2
  19. 150
  20. 3280
  21. 2040
  22. 850
  23. 1350
  24. 280
  25. 2340
  26. 4900
  27. 5
  28. 60
  29. 500
  30. 420
  31. 2
  32. 4
  33. 400
  34. 4
  35. 1240
  36. 50
  37. 380
  38. 1
  39. 290
  40. 3

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