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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 966 · 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 smooth ramp is 8 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A force of 170 N pushes a cart 1 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 10 N pushes a cart 1 m along the floor. How much work is done, in joules?
  4. 4.🏋️ 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)
  5. 5.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  8. 8.🏋️ Pushing a crate 7 m took 2030 J of work. What force was used, in newtons?
  9. 9.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
  10. 10.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ Pushing a crate 3 m took 210 J of work. What force was used, in newtons?
  12. 12.🏋️ 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?
  13. 13.🏋️ Pushing a crate 2 m took 960 J of work. What force was used, in newtons?
  14. 14.🏋️ Pushing a crate 1 m took 440 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 10 N did 50 J of work. How many metres did the object move?
  16. 16.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  19. 19.🏋️ Pushing a crate 1 m took 260 J of work. What force was used, in newtons?
  20. 20.🏋️ 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?
  21. 21.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 140 N pushes a cart 10 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  24. 24.🏋️ Pushing a crate 10 m took 1500 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 240 N pushes a cart 3 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 90 N did 180 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 500 N pushes a cart 6 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 420 N pushes a cart 4 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 190 N pushes a cart 4 m along the floor. How much work is done, in joules?
  30. 30.🏋️ 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?
  31. 31.🏋️ A force of 490 N pushes a cart 4 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 130 N pushes a cart 7 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A force of 310 N pushes a cart 8 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
  36. 36.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 8 m took 400 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 3 m took 390 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 410 N did 410 J of work. How many metres did the object move?

Answer key

  1. 500
  2. 170
  3. 10
  4. 300
  5. 340
  6. 250
  7. no, work stays the same
  8. 290
  9. less effort
  10. 100
  11. 70
  12. 180
  13. 480
  14. 440
  15. 5
  16. 4
  17. 5
  18. joule (J)
  19. 260
  20. 40
  21. 250
  22. 1400
  23. through a distance
  24. 150
  25. 720
  26. 2
  27. 3000
  28. 1680
  29. 760
  30. 120
  31. 1960
  32. 910
  33. 80
  34. 2480
  35. load ÷ effort
  36. 6
  37. 50
  38. 130
  39. 60
  40. 1

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