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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 300 · 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 210 N pushes a cart 8 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 310 N pushes a cart 9 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Pushing a crate 3 m took 90 J of work. What force was used, in newtons?
  5. 5.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 2 m took 480 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 500 N pushes a cart 7 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 230 N did 1610 J of work. How many metres did the object move?
  9. 9.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 440 N pushes a cart 9 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 30 N pushes a cart 3 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Pushing a crate 7 m took 1400 J of work. What force was used, in newtons?
  13. 13.🏋️ 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
  14. 14.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 280 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A 13 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 machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 150 N pushes a cart 8 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A force of 490 N pushes a cart 1 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  24. 24.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ 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)
  26. 26.🏋️ Pushing a crate 1 m took 270 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 100 N did 800 J of work. How many metres did the object move?
  28. 28.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ Pushing a crate 8 m took 1600 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 2 m took 440 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  33. 33.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  34. 34.🏋️ Pushing a crate 4 m took 880 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 70 N did 630 J of work. How many metres did the object move?
  36. 36.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ 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)
  39. 39.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ 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)

Answer key

  1. 1680
  2. 2790
  3. 4
  4. 30
  5. 2
  6. 240
  7. 3500
  8. 7
  9. 6
  10. 3960
  11. 90
  12. 200
  13. no, work stays the same
  14. 410
  15. 560
  16. 260
  17. 3
  18. 1200
  19. 90
  20. 490
  21. 6
  22. 250
  23. joule (J)
  24. 280
  25. 350
  26. 270
  27. 8
  28. 390
  29. 200
  30. 220
  31. 4
  32. less effort
  33. through a distance
  34. 220
  35. 9
  36. 2
  37. 5
  38. 550
  39. 150
  40. 50

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