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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 926 · 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.

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  1. 1.🏋️ A force of 150 N pushes a cart 9 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A force of 10 N pushes a cart 1 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
  6. 6.🏋️ A force of 480 N pushes a cart 6 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 240 N did 480 J of work. How many metres did the object move?
  8. 8.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  10. 10.🏋️ A force of 30 N did 120 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 390 N did 3510 J of work. How many metres did the object move?
  12. 12.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 270 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 4 m took 480 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 400 N did 3600 J of work. How many metres did the object move?
  16. 16.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  18. 18.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 380 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Pushing a crate 6 m took 660 J of work. What force was used, in newtons?
  21. 21.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 110 N did 550 J of work. How many metres did the object move?
  23. 23.🏋️ Pushing a crate 3 m took 60 J of work. What force was used, in newtons?
  24. 24.🏋️ Pushing a crate 1 m took 410 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 9 m took 1080 J of work. What force was used, in newtons?
  26. 26.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 8 m took 1760 J of work. What force was used, in newtons?
  29. 29.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 50 N pushes a cart 4 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 420 N did 420 J of work. How many metres did the object move?
  33. 33.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  35. 35.🏋️ A force of 310 N pushes a cart 8 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 310 N pushes a cart 3 m along the floor. How much work is done, in joules?
  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.🏋️ 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 310 N pushes a cart 9 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 3 m took 990 J of work. What force was used, in newtons?

Answer key

  1. 1350
  2. 200
  3. 10
  4. 390
  5. less effort
  6. 2880
  7. 2
  8. 120
  9. through a distance
  10. 4
  11. 9
  12. 4
  13. 540
  14. 120
  15. 9
  16. 2
  17. no, work stays the same
  18. 170
  19. 1140
  20. 110
  21. 50
  22. 5
  23. 20
  24. 410
  25. 120
  26. 250
  27. 600
  28. 220
  29. 650
  30. 400
  31. 200
  32. 1
  33. 800
  34. load ÷ effort
  35. 2480
  36. 930
  37. 850
  38. 360
  39. 2790
  40. 330

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