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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 955 · 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 80 N did 800 J of work. How many metres did the object move?
  2. 2.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  4. 4.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  6. 6.🏋️ A force of 370 N pushes a cart 3 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
  10. 10.🏋️ A force of 60 N pushes a cart 8 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  14. 14.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 240 N did 960 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 450 N pushes a cart 9 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 290 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 350 N did 2800 J of work. How many metres did the object move?
  20. 20.🏋️ Pushing a crate 2 m took 220 J of work. What force was used, in newtons?
  21. 21.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
  24. 24.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 370 N did 1110 J of work. How many metres did the object move?
  27. 27.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 370 N did 2590 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 290 N pushes a cart 3 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 3 m took 750 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ Pushing a crate 3 m took 120 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 400 N did 2000 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 4 m took 600 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 5 m took 1500 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 190 N pushes a cart 9 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 60 N did 540 J of work. How many metres did the object move?
  40. 40.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 10
  2. 800
  3. through a distance
  4. 550
  5. joule (J)
  6. 1110
  7. 950
  8. 90
  9. less effort
  10. 480
  11. 140
  12. 250
  13. load ÷ effort
  14. 600
  15. 4
  16. 4
  17. 4050
  18. 580
  19. 8
  20. 110
  21. 3
  22. 6
  23. no, work stays the same
  24. 300
  25. 150
  26. 3
  27. 100
  28. 7
  29. 870
  30. 250
  31. 6
  32. 480
  33. 40
  34. 400
  35. 5
  36. 150
  37. 300
  38. 1710
  39. 9
  40. 600

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