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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 27 · 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 machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ Pushing a crate 7 m took 1680 J of work. What force was used, in newtons?
  3. 3.🏋️ Pushing a crate 9 m took 3150 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 310 N pushes a cart 5 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 90 N did 270 J of work. How many metres did the object move?
  6. 6.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ Pushing a crate 8 m took 2880 J of work. What force was used, in newtons?
  8. 8.🏋️ 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
  9. 9.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A force of 110 N pushes a cart 7 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  14. 14.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  15. 15.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 30 N did 300 J of work. How many metres did the object move?
  17. 17.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Pushing a crate 2 m took 780 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 160 N pushes a cart 9 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  22. 22.🏋️ A force of 290 N pushes a cart 4 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) only upwards (d) without moving it
  24. 24.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 410 N did 4100 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 3 m took 870 J of work. What force was used, in newtons?
  27. 27.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 250 N pushes a cart 1 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ 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?
  34. 34.🏋️ A force of 240 N pushes a cart 5 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 110 N pushes a cart 8 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 150 N did 450 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 2 m took 800 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 340 N pushes a cart 6 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A 2 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.🏋️ Pushing a crate 7 m took 910 J of work. What force was used, in newtons?

Answer key

  1. 5
  2. 240
  3. 350
  4. 1550
  5. 3
  6. 750
  7. 360
  8. no, work stays the same
  9. 4
  10. 500
  11. 300
  12. 770
  13. less effort
  14. load ÷ effort
  15. 2
  16. 10
  17. 50
  18. 390
  19. 1440
  20. 450
  21. joule (J)
  22. 1160
  23. through a distance
  24. 5
  25. 10
  26. 290
  27. 300
  28. 70
  29. 650
  30. 250
  31. 2
  32. 200
  33. 30
  34. 1200
  35. 880
  36. 3
  37. 400
  38. 2040
  39. 40
  40. 130

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