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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 257 · 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 110 N pushes a cart 5 m along the floor. How much work is done, in joules?
  2. 2.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  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 2 m took 360 J of work. What force was used, in newtons?
  5. 5.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
  8. 8.🏋️ A force of 320 N pushes a cart 1 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Pushing a crate 5 m took 1250 J of work. What force was used, in newtons?
  12. 12.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  13. 13.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ Pushing a crate 6 m took 900 J of work. What force was used, in newtons?
  16. 16.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  17. 17.🏋️ Pushing a crate 5 m took 350 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 3 m took 960 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 190 N did 190 J of work. How many metres did the object move?
  20. 20.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  21. 21.🏋️ A force of 160 N did 1600 J of work. How many metres did the object move?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 280 N pushes a cart 3 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 240 N did 240 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 140 N pushes a cart 3 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A 12 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ Pushing a crate 8 m took 2400 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?

Answer key

  1. 550
  2. joule (J)
  3. 4
  4. 180
  5. 800
  6. 200
  7. less effort
  8. 320
  9. 750
  10. 500
  11. 250
  12. load ÷ effort
  13. 3
  14. 5
  15. 150
  16. through a distance
  17. 70
  18. 320
  19. 1
  20. no, work stays the same
  21. 10
  22. 850
  23. 840
  24. 1
  25. 420
  26. 700
  27. 120
  28. 1000
  29. 5
  30. 180
  31. 480
  32. 280
  33. 200
  34. 4
  35. 400
  36. 30
  37. 320
  38. 200
  39. 300
  40. 4

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