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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 958 · 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 250 N pushes a cart 8 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  3. 3.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  6. 6.🏋️ A force of 170 N pushes a cart 9 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Pushing a crate 2 m took 580 J of work. What force was used, in newtons?
  9. 9.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  10. 10.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ 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?
  14. 14.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ Pushing a crate 8 m took 3120 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 360 N did 1800 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 80 N pushes a cart 5 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  19. 19.🏋️ A force of 470 N pushes a cart 7 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 380 N did 380 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 450 N pushes a cart 2 m along the floor. How much work is done, in joules?
  22. 22.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 50 N did 300 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 8 m took 160 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 310 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  27. 27.🏋️ A force of 320 N did 2560 J of work. How many metres did the object move?
  28. 28.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A force of 110 N did 1100 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 10 N did 30 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 8 m took 560 J of work. What force was used, in newtons?
  32. 32.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ Pushing a crate 1 m took 500 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 470 N did 940 J of work. How many metres did the object move?
  37. 37.🏋️ 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?
  38. 38.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A force of 230 N did 1150 J of work. How many metres did the object move?

Answer key

  1. 2000
  2. less effort
  3. 850
  4. 4
  5. no, work stays the same
  6. 1530
  7. 450
  8. 290
  9. joule (J)
  10. 4
  11. 2
  12. 850
  13. 480
  14. 2
  15. 390
  16. 5
  17. 400
  18. load ÷ effort
  19. 3290
  20. 1
  21. 900
  22. 160
  23. 6
  24. 20
  25. 620
  26. through a distance
  27. 8
  28. 440
  29. 10
  30. 3
  31. 70
  32. 650
  33. 2
  34. 800
  35. 500
  36. 2
  37. 80
  38. 600
  39. 130
  40. 5

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