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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 635 · 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 smooth ramp is 6 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A force of 240 N did 2160 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 170 N did 680 J of work. How many metres did the object move?
  4. 4.🏋️ Pushing a crate 1 m took 450 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 140 N pushes a cart 8 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 80 N pushes a cart 7 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Pushing a crate 3 m took 1200 J of work. What force was used, in newtons?
  10. 10.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 10 m took 3900 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 450 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  16. 16.🏋️ A force of 70 N did 280 J of work. How many metres did the object move?
  17. 17.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  18. 18.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A force of 220 N pushes a cart 5 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  23. 23.🏋️ 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?
  24. 24.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  25. 25.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  28. 28.🏋️ A 13 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.🏋️ A force of 300 N did 2400 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 7 m took 3150 J of work. What force was used, in newtons?
  31. 31.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 270 N did 1080 J of work. How many metres did the object move?
  33. 33.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Pushing a crate 4 m took 200 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 6 m took 2280 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 2 m took 780 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 130 N did 910 J of work. How many metres did the object move?
  38. 38.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A 13 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 250 N pushes a cart 10 m along the floor. How much work is done, in joules?

Answer key

  1. 750
  2. 9
  3. 4
  4. 450
  5. 1120
  6. 560
  7. 3
  8. 700
  9. 400
  10. 2
  11. 2
  12. 390
  13. 900
  14. 550
  15. through a distance
  16. 4
  17. joule (J)
  18. 2
  19. 100
  20. 1100
  21. 250
  22. less effort
  23. 70
  24. load ÷ effort
  25. 650
  26. 3
  27. no, work stays the same
  28. 390
  29. 8
  30. 450
  31. 140
  32. 4
  33. 2
  34. 50
  35. 380
  36. 390
  37. 7
  38. 150
  39. 260
  40. 2500

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