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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 708 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  2. 2.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?
  3. 3.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 350 N pushes a cart 6 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 190 N pushes a cart 4 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 280 N did 560 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ 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)
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) effort ÷ load (d) load × effort
  12. 12.🏋️ A force of 90 N did 900 J of work. How many metres did the object move?
  13. 13.🏋️ 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)
  14. 14.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  15. 15.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 210 N did 420 J of work. How many metres did the object move?
  17. 17.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  18. 18.🏋️ A force of 190 N did 1710 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 180 N did 900 J of work. How many metres did the object move?
  20. 20.🏋️ 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)
  21. 21.🏋️ Pushing a crate 3 m took 1470 J of work. What force was used, in newtons?
  22. 22.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 410 N pushes a cart 1 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ Pushing a crate 7 m took 1540 J of work. What force was used, in newtons?
  35. 35.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
  37. 37.🏋️ A force of 250 N pushes a cart 8 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Pushing a crate 6 m took 300 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 130 N did 1300 J of work. How many metres did the object move?
  40. 40.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. no, work stays the same
  2. 100
  3. 250
  4. 2100
  5. 850
  6. 760
  7. 2
  8. 6
  9. 3
  10. 950
  11. load ÷ effort
  12. 10
  13. 50
  14. through a distance
  15. 500
  16. 2
  17. joule (J)
  18. 9
  19. 5
  20. 1000
  21. 490
  22. 1000
  23. 50
  24. 3
  25. 340
  26. 500
  27. 5
  28. 300
  29. 800
  30. 2
  31. 450
  32. 410
  33. 800
  34. 220
  35. 50
  36. less effort
  37. 2000
  38. 50
  39. 10
  40. 400

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