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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 775 · 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 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
  2. 2.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
  3. 3.🏋️ A force of 490 N pushes a cart 5 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 40 N did 240 J of work. How many metres did the object move?
  5. 5.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  6. 6.🏋️ Pushing a crate 7 m took 140 J of work. What force was used, in newtons?
  7. 7.🏋️ Pushing a crate 2 m took 20 J of work. What force was used, in newtons?
  8. 8.🏋️ A 17 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.🏋️ Pushing a crate 1 m took 100 J of work. What force was used, in newtons?
  10. 10.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  12. 12.🏋️ Pushing a crate 7 m took 1400 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 2 m took 560 J of work. What force was used, in newtons?
  14. 14.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 320 N did 2240 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 20 N did 80 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 370 N pushes a cart 9 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ 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
  20. 20.🏋️ 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?
  21. 21.🏋️ Pushing a crate 10 m took 1000 J of work. What force was used, in newtons?
  22. 22.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 130 N did 520 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 430 N pushes a cart 5 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 1 m took 320 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 340 N pushes a cart 5 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ Pushing a crate 2 m took 840 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 20 N pushes a cart 2 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 4 m took 960 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 420 N did 4200 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 10 m took 4500 J of work. What force was used, in newtons?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ 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?
  37. 37.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 80 N pushes a cart 1 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?

Answer key

  1. 1260
  2. joule (J)
  3. 2450
  4. 6
  5. less effort
  6. 20
  7. 10
  8. 850
  9. 100
  10. 150
  11. through a distance
  12. 200
  13. 280
  14. 900
  15. 7
  16. 4
  17. 3330
  18. 4
  19. no, work stays the same
  20. 180
  21. 100
  22. 6
  23. 4
  24. 2150
  25. 600
  26. 320
  27. 1700
  28. 350
  29. 420
  30. 40
  31. 6
  32. 240
  33. 10
  34. 450
  35. 150
  36. 100
  37. 240
  38. 80
  39. 150
  40. 3

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