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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 683 · 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.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  2. 2.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) only upwards (d) without moving it
  4. 4.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ Pushing a crate 10 m took 500 J of work. What force was used, in newtons?
  7. 7.🏋️ 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?
  8. 8.🏋️ A force of 480 N did 4800 J of work. How many metres did the object move?
  9. 9.🏋️ Pushing a crate 1 m took 340 J of work. What force was used, in newtons?
  10. 10.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ 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?
  12. 12.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  13. 13.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3900 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Pushing a crate 8 m took 3920 J of work. What force was used, in newtons?
  15. 15.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Pushing a crate 4 m took 600 J of work. What force was used, in newtons?
  18. 18.🏋️ 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)
  19. 19.🏋️ A force of 20 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 380 N did 3800 J of work. How many metres did the object move?
  21. 21.🏋️ Pushing a crate 8 m took 2960 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 1 m took 390 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 500 N did 4000 J of work. How many metres did the object move?
  24. 24.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 340 N pushes a cart 8 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 3 m took 780 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 130 N did 780 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 150 N did 1050 J of work. How many metres did the object move?
  31. 31.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 480 N did 3840 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 70 N pushes a cart 9 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  36. 36.🏋️ A force of 490 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 480 N pushes a cart 8 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 460 N pushes a cart 10 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 190 N pushes a cart 9 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?

Answer key

  1. no, work stays the same
  2. 700
  3. through a distance
  4. 100
  5. 20
  6. 50
  7. 360
  8. 10
  9. 340
  10. 10
  11. 390
  12. load ÷ effort
  13. 650
  14. 490
  15. 6
  16. 400
  17. 150
  18. 450
  19. 60
  20. 10
  21. 370
  22. 390
  23. 8
  24. 330
  25. 2720
  26. 50
  27. 450
  28. 260
  29. 6
  30. 7
  31. 4
  32. 8
  33. 630
  34. 4
  35. less effort
  36. 1470
  37. 3840
  38. 4600
  39. 1710
  40. 3

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