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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 859 · 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 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A force of 200 N pushes a cart 10 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  4. 4.🏋️ A force of 270 N pushes a cart 2 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  6. 6.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 140 N pushes a cart 5 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Pushing a crate 1 m took 30 J of work. What force was used, in newtons?
  10. 10.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A force of 330 N pushes a cart 10 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 430 N pushes a cart 7 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 10 N did 20 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 120 N did 1080 J of work. How many metres did the object move?
  16. 16.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 380 N did 760 J of work. How many metres did the object move?
  18. 18.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Pushing a crate 1 m took 70 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 420 N did 840 J of work. How many metres did the object move?
  21. 21.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
  22. 22.🏋️ 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?
  23. 23.🏋️ A force of 70 N pushes a cart 6 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 30 N pushes a cart 7 m along the floor. How much work is done, in joules?
  25. 25.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  26. 26.🏋️ A force of 300 N pushes a cart 4 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  30. 30.🏋️ A force of 240 N did 960 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 100 N pushes a cart 9 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 4 m took 1880 J of work. What force was used, in newtons?
  33. 33.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 100 N pushes a cart 5 m along the floor. How much work is done, in joules?
  35. 35.🏋️ 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?
  36. 36.🏋️ 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?
  37. 37.🏋️ Pushing a crate 4 m took 1120 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 60 N pushes a cart 2 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 400
  2. 2000
  3. no, work stays the same
  4. 540
  5. load ÷ effort
  6. 200
  7. 700
  8. 700
  9. 30
  10. 500
  11. 3300
  12. 3010
  13. 1080
  14. 2
  15. 9
  16. 3
  17. 2
  18. 50
  19. 70
  20. 2
  21. through a distance
  22. 40
  23. 420
  24. 210
  25. joule (J)
  26. 1200
  27. 700
  28. 900
  29. less effort
  30. 4
  31. 900
  32. 470
  33. 4
  34. 500
  35. 350
  36. 20
  37. 280
  38. 5
  39. 120
  40. 600

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