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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 957 · 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 110 N pushes a cart 3 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 30 N pushes a cart 10 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  4. 4.🏋️ A force of 170 N did 170 J of work. How many metres did the object move?
  5. 5.🏋️ Pushing a crate 1 m took 300 J of work. What force was used, in newtons?
  6. 6.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 10 m took 700 J of work. What force was used, in newtons?
  10. 10.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
  13. 13.🏋️ Pushing a crate 4 m took 1000 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 330 N did 1320 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 40 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 450 N pushes a cart 2 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Pushing a crate 4 m took 1160 J of work. What force was used, in newtons?
  19. 19.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  22. 22.🏋️ A force of 20 N did 120 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 440 N did 1320 J of work. How many metres did the object move?
  24. 24.🏋️ 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)
  25. 25.🏋️ A force of 20 N did 200 J of work. How many metres did the object move?
  26. 26.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 430 N did 430 J of work. How many metres did the object move?
  28. 28.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
  29. 29.🏋️ A force of 420 N did 840 J of work. How many metres did the object move?
  30. 30.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  31. 31.🏋️ A force of 320 N did 1600 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 400 N did 800 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 260 N pushes a cart 6 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ Pushing a crate 1 m took 440 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 7 m took 1820 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 470 N did 3290 J of work. How many metres did the object move?

Answer key

  1. 330
  2. 300
  3. load ÷ effort
  4. 1
  5. 300
  6. 600
  7. 500
  8. 2
  9. 70
  10. 20
  11. 700
  12. through a distance
  13. 250
  14. 4
  15. 80
  16. 900
  17. 100
  18. 290
  19. 6
  20. 750
  21. joule (J)
  22. 6
  23. 3
  24. 550
  25. 10
  26. 350
  27. 1
  28. less effort
  29. 2
  30. no, work stays the same
  31. 5
  32. 2
  33. 1560
  34. 2
  35. 440
  36. 3
  37. 5
  38. 260
  39. 550
  40. 7

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