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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 899 · 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 220 J of work. What force was used, in newtons?
  2. 2.🏋️ A 9 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 machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 280 N did 560 J of work. How many metres did the object move?
  5. 5.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  8. 8.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  11. 11.🏋️ A force of 30 N pushes a cart 10 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 130 N did 1300 J of work. How many metres did the object move?
  13. 13.🏋️ 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?
  14. 14.🏋️ A force of 430 N did 2580 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 130 N did 910 J of work. How many metres did the object move?
  16. 16.🏋️ Pushing a crate 7 m took 770 J of work. What force was used, in newtons?
  17. 17.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  18. 18.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 370 N pushes a cart 9 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 500 N pushes a cart 9 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Pushing a crate 9 m took 2070 J of work. What force was used, in newtons?
  24. 24.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 10 N did 90 J of work. How many metres did the object move?
  26. 26.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  28. 28.🏋️ A force of 420 N pushes a cart 6 m along the floor. How much work is done, in joules?
  29. 29.🏋️ 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?
  30. 30.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ Pushing a crate 8 m took 2320 J of work. What force was used, in newtons?
  33. 33.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ 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?
  35. 35.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ Pushing a crate 9 m took 1620 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 490 N did 2450 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 130 N did 260 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 70 N pushes a cart 9 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 30 N pushes a cart 5 m along the floor. How much work is done, in joules?

Answer key

  1. 110
  2. 90
  3. 2
  4. 2
  5. 500
  6. 4
  7. load ÷ effort
  8. 5
  9. 850
  10. no, work stays the same
  11. 300
  12. 10
  13. 40
  14. 6
  15. 7
  16. 110
  17. through a distance
  18. 300
  19. 2
  20. 350
  21. 3330
  22. 4500
  23. 230
  24. 200
  25. 9
  26. 160
  27. less effort
  28. 2520
  29. 200
  30. 750
  31. 320
  32. 290
  33. 2
  34. 120
  35. 240
  36. 180
  37. 5
  38. 2
  39. 630
  40. 150

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