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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 35 · 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 2 m took 20 J of work. What force was used, in newtons?
  2. 2.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
  4. 4.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ Pushing a crate 8 m took 2880 J of work. What force was used, in newtons?
  6. 6.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  7. 7.🏋️ Pushing a crate 10 m took 500 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 240 N pushes a cart 7 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 2 m took 620 J of work. What force was used, in newtons?
  10. 10.🏋️ Pushing a crate 7 m took 1470 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 310 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 100 N pushes a cart 2 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  14. 14.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A 12 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 machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  19. 19.🏋️ A force of 340 N pushes a cart 2 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 400 N did 2000 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 240 N pushes a cart 5 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 440 N pushes a cart 4 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Pushing a crate 2 m took 1000 J of work. What force was used, in newtons?
  24. 24.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Pushing a crate 5 m took 2150 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 250 N pushes a cart 2 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  29. 29.🏋️ A force of 260 N did 780 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 300 N pushes a cart 1 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 370 N did 1110 J of work. How many metres did the object move?
  32. 32.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ Pushing a crate 9 m took 1800 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 200 N did 1800 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 480 N pushes a cart 8 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 480 N did 4800 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 460 N pushes a cart 10 m along the floor. How much work is done, in joules?

Answer key

  1. 10
  2. 5
  3. through a distance
  4. 550
  5. 360
  6. no, work stays the same
  7. 50
  8. 1680
  9. 310
  10. 210
  11. 310
  12. 200
  13. less effort
  14. 300
  15. 240
  16. 3
  17. 330
  18. joule (J)
  19. 680
  20. 5
  21. 1200
  22. 1760
  23. 500
  24. 300
  25. 430
  26. 500
  27. 3
  28. load ÷ effort
  29. 3
  30. 300
  31. 3
  32. 200
  33. 200
  34. 950
  35. 9
  36. 3840
  37. 4
  38. 850
  39. 10
  40. 4600

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