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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 547 · 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.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
  2. 2.🏋️ Pushing a crate 4 m took 1640 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 60 N pushes a cart 4 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 410 N pushes a cart 10 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 120 N pushes a cart 7 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
  9. 9.🏋️ 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
  10. 10.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A force of 400 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 300 N did 900 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 60 N pushes a cart 2 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Pushing a crate 3 m took 180 J of work. What force was used, in newtons?
  18. 18.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  19. 19.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 10 N did 30 J of work. How many metres did the object move?
  21. 21.🏋️ 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?
  22. 22.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 340 N did 340 J of work. How many metres did the object move?
  24. 24.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 330 N pushes a cart 3 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 10 m took 1700 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ Pushing a crate 2 m took 320 J of work. What force was used, in newtons?
  30. 30.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
  32. 32.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A 16 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 force of 30 N pushes a cart 1 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 150 N did 450 J of work. How many metres did the object move?

Answer key

  1. joule (J)
  2. 410
  3. 240
  4. 4100
  5. 840
  6. 50
  7. 650
  8. load ÷ effort
  9. no, work stays the same
  10. 200
  11. 400
  12. 550
  13. 750
  14. 2
  15. 3
  16. 120
  17. 60
  18. less effort
  19. 5
  20. 3
  21. 950
  22. 600
  23. 1
  24. 300
  25. 990
  26. 170
  27. 1290
  28. 200
  29. 160
  30. 200
  31. 800
  32. 900
  33. 1000
  34. 6
  35. 350
  36. 160
  37. 30
  38. 750
  39. 2
  40. 3

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