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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 578 · 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 100 N pushes a cart 1 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3900 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ 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
  5. 5.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ Pushing a crate 3 m took 1140 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 290 N did 870 J of work. How many metres did the object move?
  9. 9.🏋️ Pushing a crate 8 m took 2160 J of work. What force was used, in newtons?
  10. 10.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
  13. 13.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 190 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Pushing a crate 8 m took 720 J of work. What force was used, in newtons?
  17. 17.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  18. 18.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 170 N did 1530 J of work. How many metres did the object move?
  21. 21.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  24. 24.🏋️ A force of 300 N did 1500 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 480 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ Pushing a crate 4 m took 1360 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 270 N did 2430 J of work. How many metres did the object move?
  29. 29.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  32. 32.🏋️ A force of 10 N pushes a cart 6 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 220 N pushes a cart 5 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ 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)
  37. 37.🏋️ Pushing a crate 3 m took 150 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 2 m took 620 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 6 m took 1860 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?

Answer key

  1. 100
  2. 650
  3. 2
  4. no, work stays the same
  5. 550
  6. 40
  7. 380
  8. 3
  9. 270
  10. 210
  11. 6
  12. less effort
  13. 2
  14. 4
  15. 380
  16. 90
  17. load ÷ effort
  18. 5
  19. 2
  20. 9
  21. 850
  22. 2
  23. joule (J)
  24. 5
  25. 960
  26. 360
  27. 340
  28. 9
  29. 3
  30. 4
  31. through a distance
  32. 60
  33. 1100
  34. 3
  35. 900
  36. 450
  37. 50
  38. 310
  39. 310
  40. 6

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