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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 46 · 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.🏋️ Pushing a crate 3 m took 330 J of work. What force was used, in newtons?
  2. 2.🏋️ Pushing a crate 7 m took 700 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 470 N did 4700 J of work. How many metres did the object move?
  4. 4.🏋️ Pushing a crate 1 m took 420 J of work. What force was used, in newtons?
  5. 5.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 40 N did 160 J of work. How many metres did the object move?
  7. 7.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  8. 8.🏋️ A force of 450 N pushes a cart 3 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ Pushing a crate 10 m took 4100 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 200 N did 1000 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 10 N pushes a cart 9 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 110 N pushes a cart 3 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A force of 50 N did 300 J of work. How many metres did the object move?
  16. 16.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
  17. 17.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 440 N did 1760 J of work. How many metres did the object move?
  22. 22.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  24. 24.🏋️ A force of 310 N pushes a cart 7 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 10 N pushes a cart 5 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 1 m took 410 J of work. What force was used, in newtons?
  27. 27.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 130 N pushes a cart 6 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  31. 31.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 400 N did 1600 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 400 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ Pushing a crate 7 m took 2660 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Pushing a crate 6 m took 1620 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 80 N pushes a cart 3 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?

Answer key

  1. 110
  2. 100
  3. 10
  4. 420
  5. 300
  6. 4
  7. no, work stays the same
  8. 1350
  9. 900
  10. 410
  11. 5
  12. 90
  13. 330
  14. 350
  15. 6
  16. less effort
  17. 650
  18. 600
  19. 900
  20. 3
  21. 4
  22. 240
  23. load ÷ effort
  24. 2170
  25. 50
  26. 410
  27. 20
  28. 780
  29. 6
  30. joule (J)
  31. 210
  32. 4
  33. 200
  34. 380
  35. 6
  36. 6
  37. 50
  38. 270
  39. 240
  40. 440

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