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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 115 · 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 140 N did 700 J of work. How many metres did the object move?
  2. 2.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  3. 3.🏋️ Pushing a crate 1 m took 280 J of work. What force was used, in newtons?
  4. 4.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  7. 7.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  8. 8.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ 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?
  10. 10.🏋️ A force of 140 N pushes a cart 10 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 100 N pushes a cart 7 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Pushing a crate 7 m took 210 J of work. What force was used, in newtons?
  14. 14.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  15. 15.🏋️ Pushing a crate 2 m took 360 J of work. What force was used, in newtons?
  16. 16.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 290 N pushes a cart 3 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 470 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 350 N pushes a cart 7 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 240 N did 240 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 150 N pushes a cart 6 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 2 m took 280 J of work. What force was used, in newtons?
  26. 26.🏋️ 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?
  27. 27.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  30. 30.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 360 N did 1080 J of work. How many metres did the object move?
  32. 32.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 200 N pushes a cart 3 m along the floor. How much work is done, in joules?
  35. 35.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 240 N did 2400 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 190 N did 1140 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 30 N did 300 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 240 N pushes a cart 4 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?

Answer key

  1. 5
  2. less effort
  3. 280
  4. 150
  5. 950
  6. load ÷ effort
  7. no, work stays the same
  8. 400
  9. 240
  10. 1400
  11. 100
  12. 700
  13. 30
  14. joule (J)
  15. 180
  16. 450
  17. 870
  18. 220
  19. 1410
  20. 100
  21. 2450
  22. 1
  23. 5
  24. 900
  25. 140
  26. 300
  27. 5
  28. 900
  29. through a distance
  30. 4
  31. 3
  32. 2
  33. 5
  34. 600
  35. 440
  36. 10
  37. 6
  38. 10
  39. 960
  40. 3

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