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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 228 · 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 150 N did 300 J of work. How many metres did the object move?
  2. 2.🏋️ Pushing a crate 7 m took 2030 J of work. What force was used, in newtons?
  3. 3.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 480 N pushes a cart 2 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 80 N pushes a cart 3 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
  7. 7.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  8. 8.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  9. 9.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 350 N did 1750 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 260 N did 1300 J of work. How many metres did the object move?
  12. 12.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  13. 13.🏋️ 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?
  14. 14.🏋️ A force of 480 N pushes a cart 7 m along the floor. How much work is done, in joules?
  15. 15.🏋️ 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?
  16. 16.🏋️ 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?
  17. 17.🏋️ A force of 80 N pushes a cart 5 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 390 N pushes a cart 10 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 420 N did 4200 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 480 N pushes a cart 1 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Pushing a crate 6 m took 300 J of work. What force was used, in newtons?
  25. 25.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ 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)
  28. 28.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 350 N did 700 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 500 N did 1000 J of work. How many metres did the object move?
  32. 32.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
  33. 33.🏋️ A force of 140 N did 1120 J of work. How many metres did the object move?
  34. 34.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 80 N did 240 J of work. How many metres did the object move?
  40. 40.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?

Answer key

  1. 2
  2. 290
  3. 700
  4. 960
  5. 240
  6. through a distance
  7. load ÷ effort
  8. joule (J)
  9. 100
  10. 5
  11. 5
  12. less effort
  13. 160
  14. 3360
  15. 180
  16. 40
  17. 400
  18. 2
  19. 3900
  20. 750
  21. 10
  22. 480
  23. 800
  24. 50
  25. 250
  26. 300
  27. 150
  28. 4
  29. 450
  30. 2
  31. 2
  32. no, work stays the same
  33. 8
  34. 200
  35. 3
  36. 4
  37. 850
  38. 200
  39. 3
  40. 3

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