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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 665 · 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 machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  3. 3.🏋️ A force of 120 N did 120 J of work. How many metres did the object move?
  4. 4.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  6. 6.🏋️ A force of 450 N did 900 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 350 N pushes a cart 10 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 420 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 3 m took 150 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 420 N pushes a cart 9 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  13. 13.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ 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?
  15. 15.🏋️ Pushing a crate 5 m took 600 J of work. What force was used, in newtons?
  16. 16.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 360 N pushes a cart 7 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 60 N pushes a cart 8 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 380 N did 3420 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 380 N did 2660 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 170 N did 510 J of work. How many metres did the object move?
  25. 25.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  27. 27.🏋️ A force of 310 N did 1240 J of work. How many metres did the object move?
  28. 28.🏋️ Pushing a crate 5 m took 1850 J of work. What force was used, in newtons?
  29. 29.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 110 N did 880 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 150 N pushes a cart 4 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 190 N did 1520 J of work. How many metres did the object move?
  33. 33.🏋️ 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?
  34. 34.🏋️ A force of 440 N did 1320 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 480 N did 960 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 390 N did 1170 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 8 m took 480 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 250 N did 2500 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 270 N pushes a cart 5 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?

Answer key

  1. 6
  2. less effort
  3. 1
  4. 150
  5. joule (J)
  6. 2
  7. 3500
  8. 840
  9. 5
  10. 50
  11. 3780
  12. no, work stays the same
  13. 1000
  14. 1000
  15. 120
  16. 4
  17. 1260
  18. 4
  19. 2520
  20. 2
  21. 480
  22. 9
  23. 7
  24. 3
  25. 250
  26. through a distance
  27. 4
  28. 370
  29. 750
  30. 8
  31. 600
  32. 8
  33. 120
  34. 3
  35. 2
  36. 3
  37. 60
  38. 10
  39. 1350
  40. 4

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