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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 800 · 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 smooth ramp is 6 m long and rises 3 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 360 N pushes a cart 2 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  8. 8.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  9. 9.🏋️ A force of 320 N did 640 J of work. How many metres did the object move?
  10. 10.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) only upwards (d) without moving it
  11. 11.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  12. 12.🏋️ A force of 410 N pushes a cart 1 m along the floor. How much work is done, in joules?
  13. 13.🏋️ 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)
  14. 14.🏋️ A 14 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.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 20 N pushes a cart 3 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Pushing a crate 2 m took 120 J of work. What force was used, in newtons?
  18. 18.🏋️ 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?
  19. 19.🏋️ Pushing a crate 2 m took 300 J of work. What force was used, in newtons?
  20. 20.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 330 N did 1320 J of work. How many metres did the object move?
  23. 23.🏋️ Pushing a crate 10 m took 4600 J of work. What force was used, in newtons?
  24. 24.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  25. 25.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 320 N pushes a cart 1 m along the floor. How much work is done, in joules?
  27. 27.🏋️ Pushing a crate 3 m took 1140 J of work. What force was used, in newtons?
  28. 28.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ 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)
  30. 30.🏋️ A force of 320 N did 2880 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 8 m took 2240 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 360 N did 1080 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 490 N pushes a cart 1 m along the floor. How much work is done, in joules?
  35. 35.🏋️ 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?
  36. 36.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 250 N did 500 J of work. How many metres did the object move?
  38. 38.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?

Answer key

  1. 50
  2. 480
  3. 850
  4. 500
  5. 720
  6. 3
  7. less effort
  8. load ÷ effort
  9. 2
  10. through a distance
  11. joule (J)
  12. 410
  13. 750
  14. 140
  15. 4
  16. 60
  17. 60
  18. 240
  19. 150
  20. 950
  21. 5
  22. 4
  23. 460
  24. no, work stays the same
  25. 150
  26. 320
  27. 380
  28. 5
  29. 950
  30. 9
  31. 280
  32. 1
  33. 3
  34. 490
  35. 30
  36. 2
  37. 2
  38. 160
  39. 3
  40. 2

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