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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 880 · 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 longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  2. 2.🏋️ A force of 300 N pushes a cart 9 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 270 N did 540 J of work. How many metres did the object move?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  6. 6.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 270 N did 270 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 90 N did 360 J of work. How many metres did the object move?
  11. 11.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ Pushing a crate 9 m took 1080 J of work. What force was used, in newtons?
  14. 14.🏋️ Pushing a crate 9 m took 2610 J of work. What force was used, in newtons?
  15. 15.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  16. 16.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Pushing a crate 4 m took 520 J of work. What force was used, in newtons?
  18. 18.🏋️ 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?
  19. 19.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ Pushing a crate 1 m took 380 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 4 m took 1120 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 1 m took 330 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 300 N pushes a cart 7 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ 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?
  26. 26.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 150 N did 750 J of work. How many metres did the object move?
  28. 28.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 90 N pushes a cart 9 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Pushing a crate 2 m took 120 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 330 N did 2310 J of work. How many metres did the object move?
  33. 33.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  35. 35.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 450 N did 1350 J of work. How many metres did the object move?
  38. 38.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 290 N pushes a cart 7 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. less effort
  2. 2700
  3. 4
  4. 2
  5. no, work stays the same
  6. 600
  7. 1
  8. 3
  9. 5
  10. 4
  11. 800
  12. 180
  13. 120
  14. 290
  15. joule (J)
  16. 150
  17. 130
  18. 160
  19. 40
  20. 380
  21. 280
  22. 330
  23. 2100
  24. 700
  25. 30
  26. 5
  27. 5
  28. 200
  29. 510
  30. 810
  31. 60
  32. 7
  33. 100
  34. through a distance
  35. 5
  36. 250
  37. 3
  38. 650
  39. 2030
  40. 550

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