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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 358 · 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 90 N did 900 J of work. How many metres did the object move?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  3. 3.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 310 N did 1860 J of work. How many metres did the object move?
  5. 5.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 100 N pushes a cart 2 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 460 N did 460 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ Pushing a crate 5 m took 100 J of work. What force was used, in newtons?
  14. 14.🏋️ Pushing a crate 1 m took 100 J of work. What force was used, in newtons?
  15. 15.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 60 N pushes a cart 9 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 20 N pushes a cart 7 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 270 N pushes a cart 5 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 210 N pushes a cart 8 m along the floor. How much work is done, in joules?
  21. 21.🏋️ 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?
  22. 22.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A 12 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 390 N pushes a cart 5 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  27. 27.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  29. 29.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 450 N did 1800 J of work. How many metres did the object move?
  32. 32.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  33. 33.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  35. 35.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A 1 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 smooth ramp is 8 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 220 N did 1540 J of work. How many metres did the object move?
  39. 39.🏋️ 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?
  40. 40.🏋️ A force of 480 N did 2880 J of work. How many metres did the object move?

Answer key

  1. 10
  2. no, work stays the same
  3. 240
  4. 6
  5. 750
  6. 200
  7. 1
  8. 5
  9. 750
  10. 50
  11. 650
  12. 3
  13. 20
  14. 100
  15. 6
  16. 540
  17. 140
  18. 550
  19. 1350
  20. 1680
  21. 160
  22. 250
  23. 480
  24. 6
  25. 1950
  26. load ÷ effort
  27. 6
  28. through a distance
  29. 50
  30. 4
  31. 4
  32. less effort
  33. 90
  34. joule (J)
  35. 500
  36. 10
  37. 350
  38. 7
  39. 180
  40. 6

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