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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 259 · 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.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  2. 2.🏋️ 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?
  3. 3.🏋️ A force of 470 N pushes a cart 6 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Pushing a crate 9 m took 3780 J of work. What force was used, in newtons?
  5. 5.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  7. 7.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  10. 10.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 220 N pushes a cart 3 m along the floor. How much work is done, in joules?
  12. 12.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  13. 13.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 130 N did 1300 J of work. How many metres did the object move?
  15. 15.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 110 N pushes a cart 7 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 5 m took 1550 J of work. What force was used, in newtons?
  19. 19.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 140 N pushes a cart 10 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 480 N pushes a cart 2 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 70 N did 560 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 250 N pushes a cart 4 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 280 N did 2800 J of work. How many metres did the object move?
  31. 31.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 180 N did 1800 J of work. How many metres did the object move?
  34. 34.🏋️ 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?
  35. 35.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ Pushing a crate 5 m took 700 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 350 N did 350 J of work. How many metres did the object move?
  39. 39.🏋️ Pushing a crate 1 m took 160 J of work. What force was used, in newtons?
  40. 40.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance

Answer key

  1. less effort
  2. 50
  3. 2820
  4. 420
  5. 3
  6. no, work stays the same
  7. 2
  8. 410
  9. load ÷ effort
  10. 200
  11. 660
  12. joule (J)
  13. 100
  14. 10
  15. 700
  16. 6
  17. 770
  18. 310
  19. 450
  20. 360
  21. 2
  22. 6
  23. 210
  24. 200
  25. 1400
  26. 20
  27. 960
  28. 8
  29. 1000
  30. 10
  31. 300
  32. 5
  33. 10
  34. 170
  35. 3
  36. 120
  37. 140
  38. 1
  39. 160
  40. through a distance

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