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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 599 · 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 machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 160 N pushes a cart 1 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  5. 5.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Pushing a crate 1 m took 150 J of work. What force was used, in newtons?
  9. 9.🏋️ Pushing a crate 5 m took 1650 J of work. What force was used, in newtons?
  10. 10.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ 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?
  14. 14.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ Pushing a crate 5 m took 1200 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 360 N did 3240 J of work. How many metres did the object move?
  17. 17.🏋️ Pushing a crate 6 m took 2760 J of work. What force was used, in newtons?
  18. 18.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  19. 19.🏋️ A force of 290 N pushes a cart 4 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 490 N pushes a cart 8 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Pushing a crate 1 m took 10 J of work. What force was used, in newtons?
  24. 24.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  25. 25.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 350 N pushes a cart 1 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 30 N did 180 J of work. How many metres did the object move?
  28. 28.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 230 N did 690 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 200 N pushes a cart 5 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A 19 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.🏋️ 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?
  34. 34.🏋️ A force of 320 N did 1920 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 380 N pushes a cart 4 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  37. 37.🏋️ A force of 350 N did 1400 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 7 m took 1400 J of work. What force was used, in newtons?
  39. 39.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 110 N pushes a cart 9 m along the floor. How much work is done, in joules?

Answer key

  1. 6
  2. 160
  3. 3
  4. through a distance
  5. 100
  6. 4
  7. 5
  8. 150
  9. 330
  10. 320
  11. 60
  12. 6
  13. 250
  14. 1000
  15. 240
  16. 9
  17. 460
  18. less effort
  19. 1160
  20. 40
  21. 4
  22. 3920
  23. 10
  24. load ÷ effort
  25. 2
  26. 350
  27. 6
  28. 50
  29. 4
  30. 3
  31. 1000
  32. 950
  33. 100
  34. 6
  35. 1520
  36. no, work stays the same
  37. 4
  38. 200
  39. 4
  40. 990

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