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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 555 · 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 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 240 N pushes a cart 6 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A force of 270 N pushes a cart 2 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 380 N did 3800 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 360 N did 2880 J of work. How many metres did the object move?
  9. 9.🏋️ Pushing a crate 9 m took 4410 J of work. What force was used, in newtons?
  10. 10.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Pushing a crate 9 m took 180 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 280 N pushes a cart 7 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  14. 14.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
  15. 15.🏋️ A force of 480 N pushes a cart 6 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 190 N pushes a cart 10 m along the floor. How much work is done, in joules?
  18. 18.🏋️ 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)
  19. 19.🏋️ A force of 270 N did 2430 J of work. How many metres did the object move?
  20. 20.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  22. 22.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 10 m took 1400 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 3 m took 120 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 10 m took 1000 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 1 m took 490 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 430 N did 2580 J of work. How many metres did the object move?
  29. 29.🏋️ 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?
  30. 30.🏋️ A force of 160 N did 480 J of work. How many metres did the object move?
  31. 31.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 60 N did 540 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 410 N did 3690 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 500 N pushes a cart 6 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 40 N pushes a cart 3 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 240 N did 240 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 400 N pushes a cart 4 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 160 N did 160 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 20 N did 60 J of work. How many metres did the object move?

Answer key

  1. 30
  2. 3
  3. 760
  4. 1440
  5. 70
  6. 540
  7. 10
  8. 8
  9. 490
  10. 100
  11. 20
  12. 1960
  13. through a distance
  14. joule (J)
  15. 2880
  16. 100
  17. 1900
  18. 200
  19. 9
  20. 5
  21. no, work stays the same
  22. 2
  23. 4
  24. 140
  25. 40
  26. 100
  27. 490
  28. 6
  29. 240
  30. 3
  31. 1000
  32. 9
  33. 9
  34. 3000
  35. 120
  36. 380
  37. 1
  38. 1600
  39. 1
  40. 3

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