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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 533 · 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 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  4. 4.🏋️ A force of 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Pushing a crate 3 m took 780 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 290 N pushes a cart 6 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 310 N pushes a cart 7 m along the floor. How much work is done, in joules?
  8. 8.🏋️ 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
  9. 9.🏋️ A force of 450 N did 4500 J of work. How many metres did the object move?
  10. 10.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  11. 11.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 400 N pushes a cart 5 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 90 N pushes a cart 1 m along the floor. How much work is done, in joules?
  14. 14.🏋️ 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?
  15. 15.🏋️ A force of 140 N did 560 J of work. How many metres did the object move?
  16. 16.🏋️ Pushing a crate 3 m took 1440 J of work. What force was used, in newtons?
  17. 17.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 310 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 430 N pushes a cart 6 m along the floor. How much work is done, in joules?
  20. 20.🏋️ 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?
  21. 21.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  23. 23.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
  24. 24.🏋️ Pushing a crate 2 m took 920 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 290 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 420 N pushes a cart 1 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 410 N did 1230 J of work. How many metres did the object move?
  33. 33.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ 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?
  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.🏋️ Pushing a crate 6 m took 900 J of work. What force was used, in newtons?
  38. 38.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?

Answer key

  1. 50
  2. 550
  3. joule (J)
  4. 70
  5. 260
  6. 1740
  7. 2170
  8. no, work stays the same
  9. 10
  10. through a distance
  11. 6
  12. 2000
  13. 90
  14. 250
  15. 4
  16. 480
  17. 350
  18. 930
  19. 2580
  20. 100
  21. 6
  22. load ÷ effort
  23. less effort
  24. 460
  25. 580
  26. 420
  27. 250
  28. 1
  29. 410
  30. 2
  31. 550
  32. 3
  33. 950
  34. 6
  35. 100
  36. 500
  37. 150
  38. 180
  39. 480
  40. 4

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