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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 900 · 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 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)
  2. 2.🏋️ Pushing a crate 10 m took 1800 J of work. What force was used, in newtons?
  3. 3.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  4. 4.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 240 N pushes a cart 8 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 30 N pushes a cart 2 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 8 m took 3040 J of work. What force was used, in newtons?
  8. 8.🏋️ Pushing a crate 1 m took 190 J of work. What force was used, in newtons?
  9. 9.🏋️ 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?
  10. 10.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Pushing a crate 3 m took 900 J of work. What force was used, in newtons?
  12. 12.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  13. 13.🏋️ A force of 490 N did 1960 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 400 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  16. 16.🏋️ 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?
  17. 17.🏋️ Pushing a crate 2 m took 160 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 8 m took 80 J of work. What force was used, in newtons?
  19. 19.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  21. 21.🏋️ A force of 410 N did 1640 J of work. How many metres did the object move?
  22. 22.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 200 N did 1800 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 80 N pushes a cart 2 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 310 N did 2480 J of work. How many metres did the object move?
  27. 27.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 150 N pushes a cart 10 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  30. 30.🏋️ A force of 230 N did 1150 J of work. How many metres did the object move?
  31. 31.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ 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?
  35. 35.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 9 m took 630 J of work. What force was used, in newtons?
  39. 39.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ 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?

Answer key

  1. 500
  2. 180
  3. through a distance
  4. 150
  5. 1920
  6. 60
  7. 380
  8. 190
  9. 160
  10. 6
  11. 300
  12. no, work stays the same
  13. 4
  14. 1200
  15. 410
  16. 80
  17. 80
  18. 10
  19. 450
  20. less effort
  21. 4
  22. 5
  23. 9
  24. 160
  25. 220
  26. 8
  27. 100
  28. 1500
  29. load ÷ effort
  30. 5
  31. 400
  32. 240
  33. 600
  34. 40
  35. 5
  36. 700
  37. 2
  38. 70
  39. 5
  40. 40

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