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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 192 · 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 500 N did 2500 J of work. How many metres did the object move?
  2. 2.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A force of 110 N pushes a cart 9 m along the floor. How much work is done, in joules?
  4. 4.🏋️ 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?
  5. 5.🏋️ A force of 30 N did 60 J of work. How many metres did the object move?
  6. 6.🏋️ Pushing a crate 10 m took 3200 J of work. What force was used, in newtons?
  7. 7.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 500 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 8 m took 1680 J of work. What force was used, in newtons?
  10. 10.🏋️ Pushing a crate 6 m took 660 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 300 N did 1200 J of work. How many metres did the object move?
  12. 12.🏋️ Pushing a crate 3 m took 690 J of work. What force was used, in newtons?
  13. 13.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  14. 14.🏋️ 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
  15. 15.🏋️ A force of 130 N did 260 J of work. How many metres did the object move?
  16. 16.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  17. 17.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A force of 400 N did 800 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 480 N pushes a cart 9 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  21. 21.🏋️ Pushing a crate 4 m took 480 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 3 m took 990 J of work. What force was used, in newtons?
  23. 23.🏋️ 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?
  24. 24.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 260 N did 260 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 460 N did 2760 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 5 m took 350 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 9 m took 2790 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 6 m took 2280 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 340 N pushes a cart 2 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 9 m took 2340 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 4 m took 1640 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 10 m took 900 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 310 N did 2480 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 2 m took 220 J of work. What force was used, in newtons?
  39. 39.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  40. 40.🏋️ 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?

Answer key

  1. 5
  2. 500
  3. 990
  4. 300
  5. 2
  6. 320
  7. 350
  8. 4000
  9. 210
  10. 110
  11. 4
  12. 230
  13. joule (J)
  14. no, work stays the same
  15. 2
  16. through a distance
  17. 280
  18. 2
  19. 4320
  20. load ÷ effort
  21. 120
  22. 330
  23. 240
  24. 450
  25. 1
  26. 2
  27. 450
  28. 6
  29. 70
  30. 310
  31. 6
  32. 380
  33. 680
  34. 260
  35. 410
  36. 90
  37. 8
  38. 110
  39. less effort
  40. 600

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