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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 565 · 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.🏋️ Pushing a crate 1 m took 60 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 180 N pushes a cart 10 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 180 N pushes a cart 4 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 180 N did 540 J of work. How many metres did the object move?
  5. 5.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ Pushing a crate 10 m took 4000 J of work. What force was used, in newtons?
  7. 7.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  8. 8.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  11. 11.🏋️ Pushing a crate 7 m took 1330 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 260 N pushes a cart 10 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ Pushing a crate 4 m took 1040 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 270 N did 1350 J of work. How many metres did the object move?
  17. 17.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  18. 18.🏋️ Pushing a crate 8 m took 1680 J of work. What force was used, in newtons?
  19. 19.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  21. 21.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 340 N did 1700 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 40 N pushes a cart 1 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ Pushing a crate 10 m took 1500 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 7 m took 2730 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 4 m took 1240 J of work. What force was used, in newtons?
  32. 32.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Pushing a crate 7 m took 70 J of work. What force was used, in newtons?
  35. 35.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 380 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 360 N pushes a cart 1 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ Pushing a crate 9 m took 720 J of work. What force was used, in newtons?

Answer key

  1. 60
  2. 1800
  3. 720
  4. 3
  5. 800
  6. 400
  7. no, work stays the same
  8. 600
  9. 6
  10. joule (J)
  11. 190
  12. 2600
  13. 750
  14. 260
  15. 70
  16. 5
  17. through a distance
  18. 210
  19. 3
  20. less effort
  21. 850
  22. 5
  23. 40
  24. 3
  25. 4
  26. 500
  27. 550
  28. 850
  29. 150
  30. 390
  31. 310
  32. 450
  33. 3
  34. 10
  35. 50
  36. 1140
  37. 360
  38. 120
  39. 100
  40. 80

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