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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 377 · 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 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A force of 400 N pushes a cart 8 m along the floor. 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 10 N pushes a cart 1 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) less effort (c) the same effort (d) more effort
  6. 6.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  7. 7.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 310 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 80 N pushes a cart 7 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 110 N did 330 J of work. How many metres did the object move?
  11. 11.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  12. 12.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ An 11 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.🏋️ Pushing a crate 10 m took 2500 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 390 N did 780 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 110 N pushes a cart 1 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 300 N did 3000 J of work. How many metres did the object move?
  18. 18.🏋️ A 7 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 490 N did 1960 J of work. How many metres did the object move?
  20. 20.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  21. 21.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 20 N did 100 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 6 m took 840 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 10 N did 40 J of work. How many metres did the object move?
  26. 26.🏋️ 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?
  27. 27.🏋️ Pushing a crate 9 m took 540 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 1 m took 420 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 4 m took 1400 J of work. What force was used, in newtons?
  30. 30.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 490 N did 2940 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 80 N pushes a cart 4 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 480 N pushes a cart 5 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 2 m took 280 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 70 N pushes a cart 1 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 310 N did 310 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 9 m took 90 J of work. What force was used, in newtons?
  39. 39.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?

Answer key

  1. 260
  2. 3200
  3. 2
  4. 10
  5. less effort
  6. load ÷ effort
  7. 350
  8. 2480
  9. 560
  10. 3
  11. joule (J)
  12. 550
  13. 550
  14. 250
  15. 2
  16. 110
  17. 10
  18. 70
  19. 4
  20. through a distance
  21. 3
  22. 280
  23. 5
  24. 140
  25. 4
  26. 360
  27. 60
  28. 420
  29. 350
  30. 150
  31. 6
  32. 320
  33. 2400
  34. 140
  35. 70
  36. no, work stays the same
  37. 1
  38. 10
  39. 350
  40. 2

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