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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 810 · 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 12 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ Pushing a crate 6 m took 1680 J of work. What force was used, in newtons?
  3. 3.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  5. 5.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 300 N pushes a cart 3 m along the floor. How much work is done, in joules?
  7. 7.🏋️ 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?
  8. 8.🏋️ A force of 390 N did 1560 J of work. How many metres did the object move?
  9. 9.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 350 N pushes a cart 10 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 440 N pushes a cart 5 m along the floor. How much work is done, in joules?
  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 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  17. 17.🏋️ A force of 300 N pushes a cart 10 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 190 N pushes a cart 1 m along the floor. How much work is done, in joules?
  19. 19.🏋️ 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)
  20. 20.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 330 N did 1980 J of work. How many metres did the object move?
  23. 23.🏋️ Pushing a crate 5 m took 250 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 280 N did 2520 J of work. How many metres did the object move?
  25. 25.🏋️ Pushing a crate 8 m took 2080 J of work. What force was used, in newtons?
  26. 26.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 160 N pushes a cart 2 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 90 N did 360 J of work. How many metres did the object move?
  29. 29.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  30. 30.🏋️ A force of 110 N did 220 J of work. How many metres did the object move?
  31. 31.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 370 N pushes a cart 2 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  35. 35.🏋️ A force of 170 N pushes a cart 5 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 380 N pushes a cart 1 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 140 N did 1120 J of work. How many metres did the object move?
  39. 39.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ Pushing a crate 8 m took 2960 J of work. What force was used, in newtons?

Answer key

  1. 900
  2. 280
  3. 5
  4. joule (J)
  5. 6
  6. 900
  7. 450
  8. 4
  9. 500
  10. 260
  11. 3500
  12. 2200
  13. 560
  14. 180
  15. 1000
  16. no, work stays the same
  17. 3000
  18. 190
  19. 100
  20. 5
  21. 3
  22. 6
  23. 50
  24. 9
  25. 260
  26. 640
  27. 320
  28. 4
  29. less effort
  30. 2
  31. 20
  32. 1000
  33. 740
  34. through a distance
  35. 850
  36. 380
  37. 4
  38. 8
  39. 6
  40. 370

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