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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 558 · 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) no effort (b) the same effort (c) more effort (d) less effort
  2. 2.🏋️ Pushing a crate 3 m took 540 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 200 N did 1000 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 490 N did 4900 J of work. How many metres did the object move?
  5. 5.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
  7. 7.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 490 N pushes a cart 8 m along the floor. How much work is done, in joules?
  10. 10.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  11. 11.🏋️ A force of 350 N pushes a cart 4 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Pushing a crate 4 m took 680 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
  14. 14.🏋️ 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)
  15. 15.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ Pushing a crate 4 m took 1120 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 7 m took 1050 J of work. What force was used, in newtons?
  18. 18.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  25. 25.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Pushing a crate 3 m took 1260 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 360 N did 2160 J of work. How many metres did the object move?
  29. 29.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  30. 30.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ Pushing a crate 8 m took 1520 J of work. What force was used, in newtons?
  32. 32.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 310 N did 1550 J of work. How many metres did the object move?
  34. 34.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ Pushing a crate 6 m took 1740 J of work. What force was used, in newtons?
  36. 36.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ Pushing a crate 1 m took 20 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 410 N pushes a cart 8 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 9 m took 2880 J of work. What force was used, in newtons?
  40. 40.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. less effort
  2. 180
  3. 5
  4. 10
  5. 500
  6. no, work stays the same
  7. 4
  8. 3
  9. 3920
  10. joule (J)
  11. 1400
  12. 170
  13. 60
  14. 300
  15. 280
  16. 280
  17. 150
  18. 50
  19. 210
  20. 2
  21. 600
  22. 250
  23. 170
  24. load ÷ effort
  25. 950
  26. 5
  27. 420
  28. 6
  29. through a distance
  30. 700
  31. 190
  32. 5
  33. 5
  34. 800
  35. 290
  36. 220
  37. 20
  38. 3280
  39. 320
  40. 180

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