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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 495 · 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 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
  3. 3.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  4. 4.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 70 N pushes a cart 1 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 470 N pushes a cart 10 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 140 N pushes a cart 1 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 20 N pushes a cart 8 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 80 N did 320 J of work. How many metres did the object move?
  12. 12.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A force of 220 N pushes a cart 9 m along the floor. How much work is done, in joules?
  14. 14.🏋️ 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?
  15. 15.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 220 N pushes a cart 1 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A force of 470 N pushes a cart 4 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Pushing a crate 6 m took 1260 J of work. What force was used, in newtons?
  21. 21.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ Pushing a crate 1 m took 270 J of work. What force was used, in newtons?
  24. 24.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  25. 25.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ 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?
  29. 29.🏋️ A force of 390 N pushes a cart 5 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 190 N pushes a cart 5 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 160 N pushes a cart 3 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 270 N pushes a cart 10 m along the floor. How much work is done, in joules?
  33. 33.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  34. 34.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 340 N pushes a cart 5 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 400 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 140 N pushes a cart 10 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 180 N pushes a cart 7 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?

Answer key

  1. 500
  2. no, work stays the same
  3. through a distance
  4. 250
  5. 950
  6. 70
  7. 4700
  8. 140
  9. 160
  10. 5
  11. 4
  12. 200
  13. 1980
  14. 30
  15. 180
  16. 220
  17. 800
  18. 1880
  19. 2
  20. 210
  21. 3
  22. 500
  23. 270
  24. less effort
  25. 2
  26. 2
  27. 300
  28. 160
  29. 1950
  30. 950
  31. 480
  32. 2700
  33. joule (J)
  34. 5
  35. 1700
  36. 1200
  37. 1400
  38. 250
  39. 1260
  40. 3

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