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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 191 · 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 260 N pushes a cart 4 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 310 N pushes a cart 3 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ 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)
  6. 6.🏋️ A force of 220 N pushes a cart 6 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 370 N pushes a cart 5 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A force of 440 N pushes a cart 9 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
  11. 11.🏋️ A force of 450 N did 2250 J of work. How many metres did the object move?
  12. 12.🏋️ 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)
  13. 13.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Pushing a crate 8 m took 960 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 6 m took 3000 J of work. What force was used, in newtons?
  16. 16.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Pushing a crate 5 m took 2400 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 410 N did 410 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 5 m took 300 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 420 N did 2100 J of work. How many metres did the object move?
  21. 21.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  22. 22.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  23. 23.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 10 N did 40 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  28. 28.🏋️ Pushing a crate 4 m took 360 J of work. What force was used, in newtons?
  29. 29.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 170 N did 1020 J of work. How many metres did the object move?
  32. 32.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 110 N did 990 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 420 N did 1260 J of work. How many metres did the object move?
  36. 36.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ 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)
  38. 38.🏋️ Pushing a crate 10 m took 4100 J of work. What force was used, in newtons?
  39. 39.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ Pushing a crate 1 m took 470 J of work. What force was used, in newtons?

Answer key

  1. 1040
  2. 930
  3. 6
  4. 2
  5. 600
  6. 1320
  7. 1850
  8. 900
  9. 3960
  10. no, work stays the same
  11. 5
  12. 50
  13. 250
  14. 120
  15. 500
  16. 350
  17. 480
  18. 1
  19. 60
  20. 5
  21. load ÷ effort
  22. joule (J)
  23. 200
  24. 4
  25. 4
  26. 3
  27. less effort
  28. 90
  29. 450
  30. 800
  31. 6
  32. 150
  33. 850
  34. 9
  35. 3
  36. 80
  37. 700
  38. 410
  39. 50
  40. 470

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