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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 991 · 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.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  2. 2.🏋️ 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
  3. 3.🏋️ A force of 310 N did 1860 J of work. How many metres did the object move?
  4. 4.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  8. 8.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 410 N pushes a cart 8 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 380 N pushes a cart 8 m along the floor. How much work is done, in joules?
  12. 12.🏋️ 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)
  13. 13.🏋️ A force of 310 N did 620 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 20 N pushes a cart 7 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 20 N did 200 J of work. How many metres did the object move?
  16. 16.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  17. 17.🏋️ A force of 450 N pushes a cart 3 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 340 N did 3400 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 150 N did 450 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ 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?
  25. 25.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 500 N did 4000 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 320 N did 1280 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 180 N did 1800 J of work. How many metres did the object move?
  30. 30.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ Pushing a crate 9 m took 630 J of work. What force was used, in newtons?
  32. 32.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ 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?
  34. 34.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 10 N did 40 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 270 N pushes a cart 4 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  38. 38.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A force of 280 N did 560 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 200 N pushes a cart 10 m along the floor. How much work is done, in joules?

Answer key

  1. less effort
  2. no, work stays the same
  3. 6
  4. 3
  5. 600
  6. 2
  7. joule (J)
  8. 3
  9. 350
  10. 3280
  11. 3040
  12. 50
  13. 2
  14. 140
  15. 10
  16. load ÷ effort
  17. 1350
  18. 5
  19. 5
  20. 120
  21. 10
  22. 3
  23. 4
  24. 120
  25. 3
  26. 250
  27. 8
  28. 4
  29. 10
  30. 500
  31. 70
  32. 550
  33. 100
  34. 3
  35. 4
  36. 1080
  37. through a distance
  38. 190
  39. 2
  40. 2000

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