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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 407 · 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 260 N did 2600 J of work. How many metres did the object move?
  2. 2.🏋️ Pushing a crate 2 m took 100 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 180 N pushes a cart 9 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 300 N pushes a cart 7 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  6. 6.🏋️ Pushing a crate 2 m took 760 J of work. What force was used, in newtons?
  7. 7.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  10. 10.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) metre (m) (d) watt hour
  11. 11.🏋️ A force of 380 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, 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.🏋️ A force of 400 N did 1200 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 300 N pushes a cart 5 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 1800 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 20 N pushes a cart 5 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 200 N pushes a cart 8 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 110 N pushes a cart 8 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 420 N pushes a cart 5 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 300 N did 2100 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 360 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 9 m took 1890 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 10 N pushes a cart 8 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 5 m took 1800 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 320 N did 3200 J of work. How many metres did the object move?
  28. 28.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
  31. 31.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ 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)
  33. 33.🏋️ Pushing a crate 7 m took 630 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 10 m took 1700 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 9 m took 450 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 260 N pushes a cart 5 m along the floor. How much work is done, in joules?
  37. 37.🏋️ 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?
  38. 38.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ Pushing a crate 1 m took 170 J of work. What force was used, in newtons?

Answer key

  1. 10
  2. 50
  3. 1620
  4. 2100
  5. no, work stays the same
  6. 380
  7. 4
  8. 4
  9. less effort
  10. joule (J)
  11. 380
  12. 360
  13. through a distance
  14. 3
  15. 1500
  16. 300
  17. 100
  18. 1600
  19. 880
  20. 50
  21. 2100
  22. 7
  23. 720
  24. 210
  25. 80
  26. 360
  27. 10
  28. 120
  29. 4
  30. load ÷ effort
  31. 440
  32. 1000
  33. 90
  34. 170
  35. 50
  36. 1300
  37. 120
  38. 510
  39. 50
  40. 170

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