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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 21 · 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.

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  1. 1.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A force of 50 N pushes a cart 10 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 50 N did 200 J of work. How many metres did the object move?
  4. 4.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ Pushing a crate 3 m took 1140 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 370 N did 2590 J of work. How many metres did the object move?
  8. 8.🏋️ A 6 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 force of 500 N pushes a cart 1 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 410 N did 820 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 10 m took 2900 J of work. What force was used, in newtons?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ 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?
  14. 14.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A force of 160 N pushes a cart 1 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  17. 17.🏋️ A force of 270 N pushes a cart 10 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 370 N pushes a cart 6 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 320 N did 1280 J of work. How many metres did the object move?
  21. 21.🏋️ Pushing a crate 7 m took 3360 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 8 m took 2480 J of work. What force was used, in newtons?
  23. 23.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  24. 24.🏋️ A 9 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 60 N pushes a cart 6 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  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 4 m took 240 J of work. What force was used, in newtons?
  29. 29.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  32. 32.🏋️ A force of 70 N pushes a cart 2 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 490 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ 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?
  35. 35.🏋️ A 17 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 300 N pushes a cart 9 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Pushing a crate 7 m took 2100 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 9 m took 1440 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 220 N did 220 J of work. How many metres did the object move?

Answer key

  1. 300
  2. 500
  3. 4
  4. 2
  5. 1000
  6. 380
  7. 7
  8. 120
  9. 500
  10. 2
  11. 290
  12. 300
  13. 600
  14. 50
  15. 160
  16. through a distance
  17. 2700
  18. 850
  19. 2220
  20. 4
  21. 480
  22. 310
  23. less effort
  24. 270
  25. 360
  26. 300
  27. 6
  28. 60
  29. 160
  30. 5
  31. load ÷ effort
  32. 140
  33. 490
  34. 10
  35. 680
  36. 500
  37. 2700
  38. 300
  39. 160
  40. 1

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