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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 540 · 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.

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  1. 1.🏋️ A force of 160 N pushes a cart 3 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 500 N did 1000 J of work. How many metres did the object move?
  3. 3.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  4. 4.🏋️ Pushing a crate 5 m took 1750 J of work. What force was used, in newtons?
  5. 5.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  6. 6.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  7. 7.🏋️ A 9 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A force of 390 N did 2730 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 170 N did 1700 J of work. How many metres did the object move?
  11. 11.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 170 N did 340 J of work. How many metres did the object move?
  15. 15.🏋️ 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?
  16. 16.🏋️ Pushing a crate 6 m took 960 J of work. What force was used, in newtons?
  17. 17.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A force of 140 N did 1400 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 180 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ 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?
  21. 21.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  22. 22.🏋️ Pushing a crate 4 m took 1360 J of work. What force was used, in newtons?
  23. 23.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Pushing a crate 1 m took 500 J of work. What force was used, in newtons?
  26. 26.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 470 N pushes a cart 9 m along the floor. How much work is done, in joules?
  29. 29.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 260 N did 1040 J of work. How many metres did the object move?
  31. 31.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
  32. 32.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A force of 180 N pushes a cart 10 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 170 N did 850 J of work. How many metres did the object move?
  35. 35.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 1 m took 230 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 420 N did 2520 J of work. How many metres did the object move?
  38. 38.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ Pushing a crate 9 m took 1800 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 120 N pushes a cart 2 m along the floor. How much work is done, in joules?

Answer key

  1. 480
  2. 2
  3. less effort
  4. 350
  5. joule (J)
  6. through a distance
  7. 450
  8. 280
  9. 7
  10. 10
  11. 6
  12. 120
  13. 100
  14. 2
  15. 90
  16. 160
  17. 420
  18. 10
  19. 540
  20. 380
  21. load ÷ effort
  22. 340
  23. 100
  24. 2
  25. 500
  26. 140
  27. 720
  28. 4230
  29. 540
  30. 4
  31. no, work stays the same
  32. 60
  33. 1800
  34. 5
  35. 6
  36. 230
  37. 6
  38. 60
  39. 200
  40. 240

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