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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 976 · 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 longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  2. 2.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ 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
  4. 4.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  5. 5.🏋️ A force of 460 N did 4600 J of work. How many metres did the object move?
  6. 6.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 20 N pushes a cart 10 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 40 N did 160 J of work. How many metres did the object move?
  11. 11.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 390 N pushes a cart 8 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 160 N did 1440 J of work. How many metres did the object move?
  15. 15.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 460 N did 1380 J of work. How many metres did the object move?
  17. 17.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 310 N did 2790 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 30 N pushes a cart 9 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Pushing a crate 3 m took 1260 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 10 m took 3200 J of work. What force was used, in newtons?
  23. 23.🏋️ Pushing a crate 2 m took 980 J of work. What force was used, in newtons?
  24. 24.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Pushing a crate 10 m took 3000 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 9 m took 1440 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 10 m took 5000 J of work. What force was used, in newtons?
  30. 30.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  31. 31.🏋️ A force of 240 N pushes a cart 2 m along the floor. How much work is done, in joules?
  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.🏋️ Pushing a crate 5 m took 600 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 6 m took 600 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 2 m took 80 J of work. What force was used, in newtons?
  36. 36.🏋️ 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?
  37. 37.🏋️ Pushing a crate 4 m took 1760 J of work. What force was used, in newtons?
  38. 38.🏋️ 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)
  39. 39.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A force of 170 N did 340 J of work. How many metres did the object move?

Answer key

  1. less effort
  2. 300
  3. no, work stays the same
  4. through a distance
  5. 10
  6. 6
  7. 200
  8. 40
  9. 2
  10. 4
  11. 5
  12. 3120
  13. 450
  14. 9
  15. 4
  16. 3
  17. 150
  18. 9
  19. 270
  20. 50
  21. 420
  22. 320
  23. 490
  24. 700
  25. 5
  26. 300
  27. 200
  28. 160
  29. 500
  30. joule (J)
  31. 480
  32. 60
  33. 120
  34. 100
  35. 40
  36. 60
  37. 440
  38. 250
  39. 180
  40. 2

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