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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 283 · 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 430 N pushes a cart 7 m along the floor. How much work is done, in joules?
  2. 2.🏋️ 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?
  3. 3.🏋️ Pushing a crate 8 m took 3120 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 490 N pushes a cart 5 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 80 N pushes a cart 5 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 450 N pushes a cart 10 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 400 N pushes a cart 2 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  12. 12.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  13. 13.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ Pushing a crate 5 m took 900 J of work. What force was used, in newtons?
  16. 16.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
  17. 17.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 90 N pushes a cart 6 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 170 N did 850 J of work. How many metres did the object move?
  20. 20.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  22. 22.🏋️ A force of 100 N did 100 J of work. How many metres did the object move?
  23. 23.🏋️ Pushing a crate 8 m took 1440 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 440 N pushes a cart 10 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 5 m took 850 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 9 m took 3330 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 7 m took 1820 J of work. What force was used, in newtons?
  28. 28.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  31. 31.🏋️ Pushing a crate 1 m took 90 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 3 m took 90 J of work. What force was used, in newtons?
  33. 33.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 190 N pushes a cart 5 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 380 N did 760 J of work. How many metres did the object move?
  36. 36.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ 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)
  40. 40.🏋️ A force of 230 N pushes a cart 8 m along the floor. How much work is done, in joules?

Answer key

  1. 3010
  2. 120
  3. 390
  4. 2450
  5. 6
  6. 400
  7. 5
  8. 4500
  9. 800
  10. 300
  11. load ÷ effort
  12. no, work stays the same
  13. 3
  14. 2
  15. 180
  16. joule (J)
  17. 4
  18. 540
  19. 5
  20. 160
  21. through a distance
  22. 1
  23. 180
  24. 4400
  25. 170
  26. 370
  27. 260
  28. 30
  29. 360
  30. less effort
  31. 90
  32. 30
  33. 2
  34. 950
  35. 2
  36. 300
  37. 3
  38. 2
  39. 100
  40. 1840

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