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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 788 · 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.🏋️ Pushing a crate 3 m took 1080 J of work. What force was used, in newtons?
  2. 2.🏋️ 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)
  3. 3.🏋️ Pushing a crate 9 m took 540 J of work. What force was used, in newtons?
  4. 4.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Pushing a crate 8 m took 960 J of work. What force was used, in newtons?
  6. 6.🏋️ Pushing a crate 3 m took 240 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 30 N pushes a cart 10 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 3 m took 1170 J of work. What force was used, in newtons?
  9. 9.🏋️ A force of 340 N pushes a cart 2 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  11. 11.🏋️ A force of 460 N pushes a cart 4 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 20 N pushes a cart 2 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 140 N pushes a cart 5 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 8 m took 1920 J of work. What force was used, in newtons?
  15. 15.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 420 N pushes a cart 9 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 480 N did 480 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 200 N pushes a cart 10 m along the floor. How much work is done, in joules?
  19. 19.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ Pushing a crate 9 m took 3330 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 150 N pushes a cart 4 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ Pushing a crate 8 m took 2000 J of work. What force was used, in newtons?
  24. 24.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  25. 25.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 240 N did 2400 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 2 m took 480 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 10 N pushes a cart 6 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Pushing a crate 4 m took 1160 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 10 m took 2300 J of work. What force was used, in newtons?
  33. 33.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  34. 34.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 280 N did 280 J of work. How many metres did the object move?
  36. 36.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ Pushing a crate 9 m took 990 J of work. What force was used, in newtons?
  38. 38.🏋️ 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?
  39. 39.🏋️ A 13 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.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)

Answer key

  1. 360
  2. 500
  3. 60
  4. 2
  5. 120
  6. 80
  7. 300
  8. 390
  9. 680
  10. through a distance
  11. 1840
  12. 40
  13. 700
  14. 240
  15. 450
  16. 3780
  17. 1
  18. 2000
  19. 110
  20. 370
  21. 600
  22. 650
  23. 250
  24. less effort
  25. 50
  26. 300
  27. 80
  28. 10
  29. 240
  30. 60
  31. 290
  32. 230
  33. load ÷ effort
  34. 100
  35. 1
  36. 340
  37. 110
  38. 150
  39. 130
  40. joule (J)

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