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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 176 · 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.

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  1. 1.🏋️ A force of 340 N pushes a cart 9 m along the floor. How much work is done, in joules?
  2. 2.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  3. 3.🏋️ Pushing a crate 4 m took 360 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 70 N pushes a cart 2 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Pushing a crate 1 m took 450 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 290 N did 2030 J of work. How many metres did the object move?
  7. 7.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  9. 9.🏋️ Pushing a crate 1 m took 490 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 60 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 420 N did 4200 J of work. How many metres did the object move?
  12. 12.🏋️ Pushing a crate 3 m took 570 J of work. What force was used, in newtons?
  13. 13.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  14. 14.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ Pushing a crate 7 m took 3010 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 60 N did 540 J of work. How many metres did the object move?
  17. 17.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A 9 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.🏋️ Pushing a crate 8 m took 2080 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 320 N pushes a cart 10 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  24. 24.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 210 N did 1890 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 60 N did 180 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 150 N did 450 J of work. How many metres did the object move?
  28. 28.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 9 m took 2160 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 7 m took 770 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 410 N pushes a cart 1 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 440 N pushes a cart 7 m along the floor. How much work is done, in joules?
  34. 34.🏋️ 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?
  35. 35.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  39. 39.🏋️ Pushing a crate 3 m took 1290 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 420 N pushes a cart 1 m along the floor. How much work is done, in joules?

Answer key

  1. 3060
  2. joule (J)
  3. 90
  4. 140
  5. 450
  6. 7
  7. 3
  8. less effort
  9. 490
  10. 360
  11. 10
  12. 190
  13. through a distance
  14. 850
  15. 430
  16. 9
  17. 2
  18. 90
  19. 260
  20. 2
  21. 3200
  22. 380
  23. load ÷ effort
  24. 250
  25. 9
  26. 3
  27. 3
  28. 4
  29. 240
  30. 110
  31. 410
  32. 850
  33. 3080
  34. 130
  35. 200
  36. 4
  37. 40
  38. no, work stays the same
  39. 430
  40. 420

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