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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 166 · 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) less effort (b) no effort (c) the same effort (d) more effort
  2. 2.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  3. 3.🏋️ A force of 50 N did 150 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 380 N did 1140 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 30 N pushes a cart 2 m along the floor. How much work is done, in joules?
  6. 6.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  7. 7.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 410 N did 820 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 270 N pushes a cart 4 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Pushing a crate 10 m took 1800 J of work. What force was used, in newtons?
  14. 14.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ 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)
  16. 16.🏋️ Pushing a crate 8 m took 960 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 10 N did 20 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 30 N pushes a cart 10 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 160 N pushes a cart 6 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  21. 21.🏋️ Pushing a crate 2 m took 680 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 130 N pushes a cart 8 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Pushing a crate 10 m took 100 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 50 N did 450 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 390 N pushes a cart 5 m along the floor. How much work is done, in joules?
  26. 26.🏋️ 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?
  27. 27.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 460 N did 4140 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 5 m took 100 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 10 m took 800 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 7 m took 3010 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 2 m took 560 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 310 N pushes a cart 4 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ Pushing a crate 10 m took 2800 J of work. What force was used, in newtons?
  38. 38.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ Pushing a crate 9 m took 1260 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 190 N pushes a cart 3 m along the floor. How much work is done, in joules?

Answer key

  1. less effort
  2. through a distance
  3. 3
  4. 3
  5. 60
  6. joule (J)
  7. 150
  8. 850
  9. 400
  10. 2
  11. 2
  12. 1080
  13. 180
  14. 4
  15. 950
  16. 120
  17. 2
  18. 300
  19. 960
  20. load ÷ effort
  21. 340
  22. 1040
  23. 10
  24. 9
  25. 1950
  26. 150
  27. 700
  28. 9
  29. 20
  30. 80
  31. 2
  32. 4
  33. 430
  34. 280
  35. 1240
  36. 450
  37. 280
  38. 100
  39. 140
  40. 570

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