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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 92 · 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.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  2. 2.🏋️ Pushing a crate 1 m took 360 J of work. What force was used, in newtons?
  3. 3.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ Pushing a crate 8 m took 80 J of work. What force was used, in newtons?
  5. 5.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  7. 7.🏋️ A force of 180 N did 1800 J of work. How many metres did the object move?
  8. 8.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  9. 9.🏋️ A force of 240 N pushes a cart 8 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A force of 280 N pushes a cart 5 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A 13 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  14. 14.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 190 N pushes a cart 3 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  18. 18.🏋️ Pushing a crate 9 m took 2700 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ Pushing a crate 5 m took 400 J of work. What force was used, in newtons?
  22. 22.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Pushing a crate 2 m took 400 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 340 N pushes a cart 8 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 500 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 370 N did 3700 J of work. How many metres did the object move?
  28. 28.🏋️ Pushing a crate 3 m took 210 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 490 N did 490 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 10 m took 500 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 9 m took 2250 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 60 N did 540 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 430 N pushes a cart 4 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 100 N pushes a cart 3 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 240 N did 1440 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 4 m took 1360 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ 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)
  40. 40.🏋️ A force of 80 N did 640 J of work. How many metres did the object move?

Answer key

  1. no, work stays the same
  2. 360
  3. 60
  4. 10
  5. 600
  6. less effort
  7. 10
  8. joule (J)
  9. 1920
  10. 450
  11. 1400
  12. 520
  13. load ÷ effort
  14. 1000
  15. 570
  16. 900
  17. through a distance
  18. 300
  19. 100
  20. 3
  21. 80
  22. 5
  23. 200
  24. 2720
  25. 1000
  26. 180
  27. 10
  28. 70
  29. 1
  30. 50
  31. 5
  32. 250
  33. 9
  34. 1720
  35. 300
  36. 6
  37. 340
  38. 5
  39. 850
  40. 8

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