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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 41 · 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.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  2. 2.🏋️ Pushing a crate 5 m took 1200 J of work. What force was used, in newtons?
  3. 3.🏋️ 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?
  4. 4.🏋️ A force of 30 N pushes a cart 1 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
  7. 7.🏋️ Pushing a crate 2 m took 60 J of work. What force was used, in newtons?
  8. 8.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  9. 9.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A force of 150 N did 900 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 110 N pushes a cart 7 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  16. 16.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 370 N did 1110 J of work. How many metres did the object move?
  20. 20.🏋️ 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?
  21. 21.🏋️ A force of 490 N did 1960 J of work. How many metres did the object move?
  22. 22.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 120 N did 360 J of work. How many metres did the object move?
  24. 24.🏋️ 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?
  25. 25.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 320 N did 1600 J of work. How many metres did the object move?
  28. 28.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 440 N did 1760 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 10 m took 2100 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 380 N pushes a cart 1 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 6 m took 1500 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 260 N pushes a cart 1 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 60 N pushes a cart 5 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 110 N pushes a cart 1 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Pushing a crate 1 m took 20 J of work. What force was used, in newtons?
  39. 39.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?

Answer key

  1. through a distance
  2. 240
  3. 360
  4. 30
  5. 2
  6. no, work stays the same
  7. 30
  8. less effort
  9. 160
  10. 450
  11. 6
  12. 770
  13. 5
  14. 150
  15. joule (J)
  16. 3
  17. 330
  18. 200
  19. 3
  20. 240
  21. 4
  22. 2
  23. 3
  24. 20
  25. 4
  26. 4
  27. 5
  28. 950
  29. 4
  30. 210
  31. 380
  32. 3
  33. 250
  34. 260
  35. 300
  36. 110
  37. 650
  38. 20
  39. 140
  40. 2

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