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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 51 · 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 force of 290 N did 580 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 180 N pushes a cart 5 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  7. 7.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A force of 360 N pushes a cart 7 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 60 N did 360 J of work. How many metres did the object move?
  11. 11.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  13. 13.🏋️ A force of 410 N did 820 J of work. How many metres did the object move?
  14. 14.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ 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
  21. 21.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 110 N pushes a cart 1 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  25. 25.🏋️ A force of 240 N pushes a cart 3 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 4 m took 1640 J of work. What force was used, in newtons?
  27. 27.🏋️ 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?
  28. 28.🏋️ Pushing a crate 10 m took 1400 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ Pushing a crate 5 m took 400 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 400 N pushes a cart 3 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ 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?
  35. 35.🏋️ A force of 160 N did 1120 J of work. How many metres did the object move?
  36. 36.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ Pushing a crate 10 m took 4200 J of work. What force was used, in newtons?
  40. 40.🏋️ 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?

Answer key

  1. 2
  2. 900
  3. 4
  4. 1500
  5. 300
  6. joule (J)
  7. 250
  8. 400
  9. 2520
  10. 6
  11. 150
  12. through a distance
  13. 2
  14. 2
  15. 5
  16. 50
  17. 80
  18. 2
  19. 900
  20. no, work stays the same
  21. 3
  22. 5
  23. 110
  24. load ÷ effort
  25. 720
  26. 410
  27. 280
  28. 140
  29. 6
  30. 80
  31. 1200
  32. 3
  33. 900
  34. 250
  35. 7
  36. 600
  37. 80
  38. 800
  39. 420
  40. 100

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