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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 507 · 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 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A force of 290 N pushes a cart 4 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  4. 4.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  5. 5.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  10. 10.🏋️ A force of 260 N pushes a cart 8 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 220 N pushes a cart 7 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 450 N did 2250 J of work. How many metres did the object move?
  14. 14.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ Pushing a crate 2 m took 740 J of work. What force was used, in newtons?
  17. 17.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  18. 18.🏋️ Pushing a crate 10 m took 4500 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 260 N did 1820 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 330 N did 2640 J of work. How many metres did the object move?
  21. 21.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 270 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ 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?
  25. 25.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  26. 26.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 120 N pushes a cart 9 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 460 N pushes a cart 2 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 290 N did 1160 J of work. How many metres did the object move?
  32. 32.🏋️ Pushing a crate 5 m took 500 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 8 m took 2320 J of work. What force was used, in newtons?
  34. 34.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ Pushing a crate 1 m took 390 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 6 m took 1320 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 460 N pushes a cart 6 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 490 N did 1470 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 490 N did 490 J of work. How many metres did the object move?
  40. 40.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?

Answer key

  1. 600
  2. 1160
  3. no, work stays the same
  4. less effort
  5. 280
  6. 300
  7. 4
  8. 850
  9. through a distance
  10. 2080
  11. 1540
  12. 6
  13. 5
  14. 80
  15. 200
  16. 370
  17. joule (J)
  18. 450
  19. 7
  20. 8
  21. 4
  22. 810
  23. 650
  24. 80
  25. load ÷ effort
  26. 2
  27. 1080
  28. 920
  29. 6
  30. 550
  31. 4
  32. 100
  33. 290
  34. 2
  35. 390
  36. 220
  37. 2760
  38. 3
  39. 1
  40. 5

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