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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 764 · 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 280 N did 280 J of work. How many metres did the object move?
  2. 2.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A force of 30 N pushes a cart 3 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 350 N did 1400 J of work. How many metres did the object move?
  5. 5.🏋️ Pushing a crate 4 m took 1920 J of work. What force was used, in newtons?
  6. 6.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 460 N pushes a cart 10 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  12. 12.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  13. 13.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  15. 15.🏋️ A force of 210 N did 420 J of work. How many metres did the object move?
  16. 16.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 60 N pushes a cart 3 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 10 N pushes a cart 5 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 9 m took 1890 J of work. What force was used, in newtons?
  20. 20.🏋️ 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
  21. 21.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ 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?
  23. 23.🏋️ A force of 40 N pushes a cart 1 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 390 N pushes a cart 7 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 380 N did 1140 J of work. How many metres did the object move?
  28. 28.🏋️ Pushing a crate 10 m took 3500 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 160 N pushes a cart 6 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 4 m took 1080 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 9 m took 360 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 180 N did 720 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 390 N pushes a cart 3 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 4 m took 840 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 210 N pushes a cart 8 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 9 m took 1620 J of work. What force was used, in newtons?
  38. 38.🏋️ 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?
  39. 39.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 350 N pushes a cart 5 m along the floor. How much work is done, in joules?

Answer key

  1. 1
  2. 330
  3. 90
  4. 4
  5. 480
  6. 150
  7. 4600
  8. 100
  9. 240
  10. 600
  11. joule (J)
  12. less effort
  13. 350
  14. through a distance
  15. 2
  16. 5
  17. 180
  18. 50
  19. 210
  20. no, work stays the same
  21. 3
  22. 60
  23. 40
  24. 2730
  25. 650
  26. 4
  27. 3
  28. 350
  29. 960
  30. 270
  31. 60
  32. 40
  33. 4
  34. 1170
  35. 210
  36. 1680
  37. 180
  38. 600
  39. 100
  40. 1750

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