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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 842 · 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.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  2. 2.🏋️ 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)
  3. 3.🏋️ A force of 390 N did 1950 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 210 N pushes a cart 2 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 5 m took 200 J of work. What force was used, in newtons?
  7. 7.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Pushing a crate 3 m took 1110 J of work. What force was used, in newtons?
  10. 10.🏋️ Pushing a crate 8 m took 4000 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  15. 15.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
  17. 17.🏋️ A 13 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.🏋️ Pushing a crate 7 m took 840 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 240 N did 480 J of work. How many metres did the object move?
  20. 20.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ 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?
  22. 22.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 200 N pushes a cart 6 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 230 N did 690 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 20 N did 180 J of work. How many metres did the object move?
  29. 29.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  30. 30.🏋️ Pushing a crate 1 m took 160 J of work. What force was used, in newtons?
  31. 31.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 80 N pushes a cart 9 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 10 m took 2200 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 450 N pushes a cart 5 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Pushing a crate 7 m took 2660 J of work. What force was used, in newtons?
  37. 37.🏋️ 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?
  38. 38.🏋️ A force of 270 N pushes a cart 1 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 8 m took 1920 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 340 N did 340 J of work. How many metres did the object move?

Answer key

  1. load ÷ effort
  2. 100
  3. 5
  4. 420
  5. 6
  6. 40
  7. 6
  8. 400
  9. 370
  10. 500
  11. 5
  12. 3
  13. 600
  14. no, work stays the same
  15. 6
  16. less effort
  17. 390
  18. 120
  19. 2
  20. 100
  21. 350
  22. 500
  23. 1200
  24. 4
  25. 500
  26. 700
  27. 3
  28. 9
  29. joule (J)
  30. 160
  31. 180
  32. 6
  33. 720
  34. 220
  35. 2250
  36. 380
  37. 130
  38. 270
  39. 240
  40. 1

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