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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 782 · 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 210 N pushes a cart 3 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  3. 3.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 320 N pushes a cart 10 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 20 N pushes a cart 5 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  7. 7.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
  8. 8.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 440 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 220 N did 1100 J of work. How many metres did the object move?
  14. 14.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 330 N pushes a cart 1 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 3 m took 600 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 120 N pushes a cart 9 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 310 N pushes a cart 6 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A 16 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 longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  23. 23.🏋️ A force of 130 N did 1040 J of work. How many metres did the object move?
  24. 24.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 200 N pushes a cart 6 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 10 N did 70 J of work. How many metres did the object move?
  27. 27.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  29. 29.🏋️ A force of 450 N pushes a cart 3 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 2 m took 360 J of work. What force was used, in newtons?
  32. 32.🏋️ 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)
  33. 33.🏋️ A force of 20 N pushes a cart 8 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 200 N pushes a cart 7 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ Pushing a crate 8 m took 2560 J of work. What force was used, in newtons?
  40. 40.🏋️ 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)

Answer key

  1. 630
  2. 90
  3. 850
  4. 3200
  5. 100
  6. load ÷ effort
  7. joule (J)
  8. 440
  9. 3
  10. 2640
  11. 140
  12. 300
  13. 5
  14. 550
  15. 550
  16. 6
  17. 330
  18. 200
  19. 1080
  20. 1860
  21. 800
  22. less effort
  23. 8
  24. 150
  25. 1200
  26. 7
  27. 150
  28. no, work stays the same
  29. 1350
  30. 4
  31. 180
  32. 850
  33. 160
  34. 1400
  35. 3
  36. 3
  37. 4
  38. 600
  39. 320
  40. 700

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