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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 500 · 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 force of 340 N did 2720 J of work. How many metres did the object move?
  2. 2.🏋️ 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)
  3. 3.🏋️ A force of 100 N pushes a cart 3 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 250 N pushes a cart 2 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 330 N pushes a cart 1 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 90 N did 360 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 110 N did 1100 J of work. How many metres did the object move?
  8. 8.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  9. 9.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A 3 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 force of 460 N did 3680 J of work. How many metres did the object move?
  13. 13.🏋️ 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?
  14. 14.🏋️ A force of 490 N did 4410 J of work. How many metres did the object move?
  15. 15.🏋️ 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?
  16. 16.🏋️ A force of 320 N did 2880 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 330 N did 2310 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 340 N did 1700 J of work. How many metres did the object move?
  19. 19.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ Pushing a crate 7 m took 1610 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 320 N pushes a cart 5 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 4 m took 1600 J of work. What force was used, in newtons?
  23. 23.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
  24. 24.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 320 N pushes a cart 9 m along the floor. How much work is done, in joules?
  26. 26.🏋️ 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?
  27. 27.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  28. 28.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ Pushing a crate 1 m took 230 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 7 m took 280 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 9 m took 3960 J of work. What force was used, in newtons?
  34. 34.🏋️ A 13 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 80 N pushes a cart 7 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 430 N did 2150 J of work. How many metres did the object move?
  37. 37.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
  40. 40.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 8
  2. 450
  3. 300
  4. 500
  5. 330
  6. 4
  7. 10
  8. no, work stays the same
  9. 800
  10. 2
  11. 30
  12. 8
  13. 160
  14. 9
  15. 800
  16. 9
  17. 7
  18. 5
  19. 950
  20. 230
  21. 1600
  22. 400
  23. less effort
  24. 850
  25. 2880
  26. 240
  27. joule (J)
  28. 180
  29. 230
  30. 40
  31. 6
  32. 4
  33. 440
  34. 520
  35. 560
  36. 5
  37. 650
  38. 250
  39. load ÷ effort
  40. 130

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