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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 661 · 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 8 m long and rises 2 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A force of 170 N did 680 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 50 N pushes a cart 3 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Pushing a crate 1 m took 230 J of work. What force was used, in newtons?
  5. 5.🏋️ 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?
  6. 6.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A force of 500 N pushes a cart 9 m along the floor. How much work is done, in joules?
  10. 10.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  11. 11.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  12. 12.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 360 N pushes a cart 9 m along the floor. How much work is done, in joules?
  14. 14.🏋️ 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?
  15. 15.🏋️ A force of 180 N pushes a cart 7 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  17. 17.🏋️ A force of 20 N pushes a cart 9 m along the floor. How much work is done, in joules?
  18. 18.🏋️ 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?
  19. 19.🏋️ A force of 440 N pushes a cart 9 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 430 N pushes a cart 2 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 40 N did 80 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 290 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  25. 25.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 100 N pushes a cart 6 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 110 N did 770 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 440 N pushes a cart 3 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A force of 170 N did 340 J of work. How many metres did the object move?
  34. 34.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 7 m took 1750 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 390 N did 2730 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 140 N did 560 J of work. How many metres did the object move?
  40. 40.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 550
  2. 4
  3. 150
  4. 230
  5. 120
  6. 950
  7. 250
  8. 450
  9. 4500
  10. joule (J)
  11. no, work stays the same
  12. 800
  13. 3240
  14. 100
  15. 1260
  16. load ÷ effort
  17. 180
  18. 200
  19. 3960
  20. 860
  21. 2
  22. 870
  23. 2
  24. through a distance
  25. 5
  26. 600
  27. 5
  28. 7
  29. 1320
  30. 6
  31. 650
  32. 700
  33. 2
  34. 800
  35. 5
  36. 2
  37. 250
  38. 7
  39. 4
  40. 350

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