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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 659 · 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.🏋️ Pushing a crate 10 m took 2800 J of work. What force was used, in newtons?
  2. 2.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  3. 3.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A force of 230 N pushes a cart 6 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  9. 9.🏋️ Pushing a crate 4 m took 1680 J of work. What force was used, in newtons?
  10. 10.🏋️ A 4 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 force of 140 N did 140 J of work. How many metres did the object move?
  12. 12.🏋️ Pushing a crate 4 m took 560 J of work. What force was used, in newtons?
  13. 13.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Pushing a crate 9 m took 2430 J of work. What force was used, in newtons?
  15. 15.🏋️ A 9 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 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 360 N pushes a cart 7 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 450 N pushes a cart 10 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 5 m took 1200 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 500 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 500 N pushes a cart 8 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 10 N did 80 J of work. How many metres did the object move?
  27. 27.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 10 N pushes a cart 6 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 120 N pushes a cart 7 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 220 N pushes a cart 7 m along the floor. How much work is done, in joules?
  32. 32.🏋️ 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?
  33. 33.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
  35. 35.🏋️ A force of 40 N did 240 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 50 N pushes a cart 9 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 70 N did 140 J of work. How many metres did the object move?
  39. 39.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 350 N pushes a cart 3 m along the floor. How much work is done, in joules?

Answer key

  1. 280
  2. through a distance
  3. 700
  4. 3
  5. 1380
  6. 4
  7. 5
  8. load ÷ effort
  9. 420
  10. 40
  11. 1
  12. 140
  13. 2
  14. 270
  15. 90
  16. 340
  17. 3
  18. 2520
  19. 850
  20. 4500
  21. 240
  22. 1500
  23. 350
  24. 2
  25. 4000
  26. 8
  27. 950
  28. 60
  29. 3
  30. 840
  31. 1540
  32. 150
  33. 100
  34. less effort
  35. 6
  36. 450
  37. 400
  38. 2
  39. 100
  40. 1050

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