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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 902 · 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 2 m long and rises 1 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ Pushing a crate 4 m took 560 J of work. What force was used, in newtons?
  3. 3.🏋️ Pushing a crate 7 m took 2380 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 450 N did 1800 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 80 N did 160 J of work. How many metres did the object move?
  6. 6.🏋️ 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)
  7. 7.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  9. 9.🏋️ Pushing a crate 4 m took 1720 J of work. What force was used, in newtons?
  10. 10.🏋️ Pushing a crate 5 m took 400 J of work. What force was used, in newtons?
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  12. 12.🏋️ A force of 150 N pushes a cart 2 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 500 N pushes a cart 9 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  15. 15.🏋️ Pushing a crate 6 m took 3000 J of work. What force was used, in newtons?
  16. 16.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 80 N did 80 J of work. How many metres did the object move?
  18. 18.🏋️ Pushing a crate 10 m took 1400 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 130 N pushes a cart 5 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 130 N did 130 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 180 N pushes a cart 8 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 390 N did 1950 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  25. 25.🏋️ Pushing a crate 1 m took 440 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 200 N did 600 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 150 N did 300 J of work. How many metres did the object move?
  28. 28.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 110 N did 990 J of work. How many metres did the object move?
  33. 33.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 250 N did 2250 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 20 N pushes a cart 8 m along the floor. How much work is done, in joules?
  36. 36.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ 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?
  39. 39.🏋️ Pushing a crate 2 m took 860 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 370 N did 370 J of work. How many metres did the object move?

Answer key

  1. 350
  2. 140
  3. 340
  4. 4
  5. 2
  6. 900
  7. 700
  8. less effort
  9. 430
  10. 80
  11. load ÷ effort
  12. 300
  13. 4500
  14. no, work stays the same
  15. 500
  16. 360
  17. 1
  18. 140
  19. 650
  20. 1
  21. 1440
  22. 5
  23. 3
  24. joule (J)
  25. 440
  26. 3
  27. 2
  28. 150
  29. 280
  30. 2
  31. 550
  32. 9
  33. 950
  34. 9
  35. 160
  36. 160
  37. 6
  38. 50
  39. 430
  40. 1

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