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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 622 · 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 machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 50 N did 100 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 380 N pushes a cart 4 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
  6. 6.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  7. 7.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  8. 8.🏋️ 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?
  9. 9.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 9 m took 2340 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ Pushing a crate 1 m took 220 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 150 N pushes a cart 6 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 270 N did 810 J of work. How many metres did the object move?
  17. 17.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 240 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  20. 20.🏋️ A force of 240 N did 240 J of work. How many metres did the object move?
  21. 21.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 160 N did 1120 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 2 m took 160 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 450 N pushes a cart 9 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Pushing a crate 10 m took 2800 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 280 N did 2240 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 290 N did 2610 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 10 m took 1000 J of work. What force was used, in newtons?
  32. 32.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 80 N pushes a cart 6 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Pushing a crate 3 m took 180 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 360 N did 1440 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 430 N pushes a cart 5 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 4 m took 1000 J of work. What force was used, in newtons?
  40. 40.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 2
  2. 2
  3. 1520
  4. 4
  5. no, work stays the same
  6. through a distance
  7. load ÷ effort
  8. 40
  9. 6
  10. 260
  11. 6
  12. 250
  13. 220
  14. 900
  15. 200
  16. 3
  17. 650
  18. 720
  19. less effort
  20. 1
  21. 150
  22. 7
  23. 2
  24. 80
  25. 4050
  26. 4
  27. 6
  28. 280
  29. 8
  30. 9
  31. 100
  32. 3
  33. 120
  34. 100
  35. 480
  36. 60
  37. 4
  38. 2150
  39. 250
  40. 420

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