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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 895 · 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.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  2. 2.🏋️ 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?
  3. 3.🏋️ Pushing a crate 6 m took 420 J of work. What force was used, in newtons?
  4. 4.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Pushing a crate 8 m took 880 J of work. What force was used, in newtons?
  6. 6.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  8. 8.🏋️ A force of 250 N did 1250 J of work. How many metres did the object move?
  9. 9.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ 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?
  11. 11.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 260 N pushes a cart 7 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 250 N did 1750 J of work. How many metres did the object move?
  14. 14.🏋️ 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?
  15. 15.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Pushing a crate 10 m took 500 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 7 m took 1050 J of work. What force was used, in newtons?
  19. 19.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  20. 20.🏋️ 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?
  21. 21.🏋️ A force of 430 N did 2580 J of work. How many metres did the object move?
  22. 22.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
  24. 24.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  25. 25.🏋️ A force of 130 N did 910 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 4 m took 1480 J of work. What force was used, in newtons?
  27. 27.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 70 N pushes a cart 8 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ 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?
  32. 32.🏋️ A force of 10 N did 10 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 7 m took 840 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 240 N pushes a cart 2 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 40 N pushes a cart 1 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. through a distance
  2. 450
  3. 70
  4. 3
  5. 110
  6. 160
  7. less effort
  8. 5
  9. 250
  10. 650
  11. 750
  12. 1820
  13. 7
  14. 480
  15. 550
  16. 500
  17. 50
  18. 150
  19. load ÷ effort
  20. 120
  21. 6
  22. 60
  23. no, work stays the same
  24. joule (J)
  25. 7
  26. 370
  27. 750
  28. 250
  29. 560
  30. 400
  31. 250
  32. 1
  33. 120
  34. 480
  35. 3
  36. 40
  37. 850
  38. 200
  39. 3
  40. 500

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