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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 592 · 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 smooth ramp is 15 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A force of 310 N pushes a cart 4 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 190 N did 570 J of work. How many metres did the object move?
  4. 4.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  6. 6.🏋️ A force of 60 N did 120 J of work. How many metres did the object move?
  7. 7.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 380 N did 1140 J of work. How many metres did the object move?
  10. 10.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Pushing a crate 9 m took 180 J of work. What force was used, in newtons?
  12. 12.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ Pushing a crate 8 m took 1680 J of work. What force was used, in newtons?
  14. 14.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Pushing a crate 2 m took 340 J of work. What force was used, in newtons?
  20. 20.🏋️ Pushing a crate 10 m took 3600 J of work. What force was used, in newtons?
  21. 21.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Pushing a crate 3 m took 1320 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 480 N pushes a cart 6 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Pushing a crate 9 m took 3600 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 4 m took 720 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 460 N did 4140 J of work. How many metres did the object move?
  28. 28.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 100 N pushes a cart 1 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 30 N did 300 J of work. How many metres did the object move?
  33. 33.🏋️ 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)
  34. 34.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  35. 35.🏋️ Pushing a crate 2 m took 860 J of work. What force was used, in newtons?
  36. 36.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A 19 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.🏋️ A force of 170 N did 1360 J of work. How many metres did the object move?

Answer key

  1. 450
  2. 1240
  3. 3
  4. joule (J)
  5. load ÷ effort
  6. 2
  7. 120
  8. 6
  9. 3
  10. 550
  11. 20
  12. 750
  13. 210
  14. 4
  15. 3
  16. 160
  17. 550
  18. 450
  19. 170
  20. 360
  21. 800
  22. 440
  23. 2880
  24. 3
  25. 400
  26. 180
  27. 9
  28. 4
  29. 100
  30. 40
  31. 600
  32. 10
  33. 700
  34. no, work stays the same
  35. 430
  36. 70
  37. 6
  38. 5
  39. 950
  40. 8

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