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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 204 · 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 400 N pushes a cart 5 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  3. 3.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  6. 6.🏋️ Pushing a crate 4 m took 1800 J of work. What force was used, in newtons?
  7. 7.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 160 N pushes a cart 1 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 7 m took 2100 J of work. What force was used, in newtons?
  15. 15.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 330 N pushes a cart 5 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 50 N did 500 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 60 N pushes a cart 9 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 220 N did 880 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 290 N pushes a cart 9 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 340 N pushes a cart 7 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  26. 26.🏋️ A force of 360 N pushes a cart 8 m along the floor. How much work is done, in joules?
  27. 27.🏋️ 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
  28. 28.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 1 m took 270 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 390 N did 1170 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 170 N did 340 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 410 N pushes a cart 7 m along the floor. How much work is done, in joules?
  33. 33.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  34. 34.🏋️ A force of 350 N did 2100 J of work. How many metres did the object move?
  35. 35.🏋️ Pushing a crate 4 m took 960 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 30 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 160 N pushes a cart 8 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 390 N pushes a cart 8 m along the floor. How much work is done, in joules?

Answer key

  1. 2000
  2. load ÷ effort
  3. 200
  4. 4
  5. less effort
  6. 450
  7. 5
  8. 500
  9. 2
  10. 160
  11. 3
  12. 50
  13. 800
  14. 300
  15. 100
  16. 50
  17. 4
  18. 4
  19. 1650
  20. 10
  21. 540
  22. 4
  23. 2610
  24. 2380
  25. through a distance
  26. 2880
  27. no, work stays the same
  28. 2
  29. 270
  30. 3
  31. 2
  32. 2870
  33. joule (J)
  34. 6
  35. 240
  36. 90
  37. 1280
  38. 3
  39. 800
  40. 3120

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