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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 221 · 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.

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  1. 1.🏋️ A force of 20 N pushes a cart 10 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  3. 3.🏋️ A force of 320 N pushes a cart 1 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Pushing a crate 2 m took 120 J of work. What force was used, in newtons?
  5. 5.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 350 N did 1050 J of work. How many metres did the object move?
  7. 7.🏋️ Pushing a crate 1 m took 330 J of work. What force was used, in newtons?
  8. 8.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  10. 10.🏋️ Pushing a crate 2 m took 400 J of work. What force was used, in newtons?
  11. 11.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 40 N pushes a cart 6 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ 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?
  15. 15.🏋️ Pushing a crate 8 m took 1360 J of work. What force was used, in newtons?
  16. 16.🏋️ A 3 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.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  18. 18.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  19. 19.🏋️ A force of 170 N did 1020 J of work. How many metres did the object move?
  20. 20.🏋️ Pushing a crate 10 m took 5000 J of work. What force was used, in newtons?
  21. 21.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 120 N did 960 J of work. How many metres did the object move?
  23. 23.🏋️ 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?
  24. 24.🏋️ 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)
  25. 25.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 110 N pushes a cart 7 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 160 N pushes a cart 5 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 7 m took 280 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ 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?
  31. 31.🏋️ 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)
  32. 32.🏋️ A force of 390 N pushes a cart 2 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  34. 34.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ Pushing a crate 4 m took 640 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 170 N pushes a cart 2 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 130 N did 260 J of work. How many metres did the object move?

Answer key

  1. 200
  2. less effort
  3. 320
  4. 60
  5. 300
  6. 3
  7. 330
  8. 100
  9. no, work stays the same
  10. 200
  11. 950
  12. 240
  13. 6
  14. 10
  15. 170
  16. 60
  17. through a distance
  18. joule (J)
  19. 6
  20. 500
  21. 4
  22. 8
  23. 650
  24. 950
  25. 200
  26. 770
  27. 800
  28. 40
  29. 5
  30. 250
  31. 550
  32. 780
  33. load ÷ effort
  34. 6
  35. 100
  36. 160
  37. 340
  38. 4
  39. 60
  40. 2

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