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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 973 · 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 force of 170 N pushes a cart 9 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 500 N pushes a cart 8 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 450 N did 2250 J of work. How many metres did the object move?
  4. 4.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
  6. 6.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ 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)
  12. 12.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  13. 13.🏋️ A force of 70 N pushes a cart 8 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 370 N pushes a cart 7 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 190 N pushes a cart 5 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 6 m took 1380 J of work. What force was used, in newtons?
  19. 19.🏋️ A 1 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.🏋️ Pushing a crate 6 m took 780 J of work. What force was used, in newtons?
  21. 21.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 20 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  29. 29.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 230 N pushes a cart 6 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 3 m took 750 J of work. What force was used, in newtons?
  33. 33.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 80 N did 80 J of work. How many metres did the object move?
  35. 35.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  36. 36.🏋️ A force of 70 N did 280 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 2 m took 340 J of work. What force was used, in newtons?
  38. 38.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 430 N did 860 J of work. How many metres did the object move?

Answer key

  1. 1530
  2. 4000
  3. 5
  4. 3
  5. less effort
  6. 120
  7. 200
  8. 200
  9. 4
  10. 2
  11. 100
  12. through a distance
  13. 560
  14. 2590
  15. 700
  16. 400
  17. 950
  18. 230
  19. 30
  20. 130
  21. 3
  22. 60
  23. 3
  24. 4
  25. 6
  26. 4
  27. 2
  28. load ÷ effort
  29. 1000
  30. 1380
  31. 2
  32. 250
  33. 500
  34. 1
  35. no, work stays the same
  36. 4
  37. 170
  38. 250
  39. 800
  40. 2

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