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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 763 · 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) the same effort (b) no effort (c) more effort (d) less effort
  2. 2.🏋️ A force of 340 N did 3060 J of work. How many metres did the object move?
  3. 3.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Pushing a crate 1 m took 340 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 350 N pushes a cart 8 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 190 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 450 N did 4050 J of work. How many metres did the object move?
  10. 10.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Pushing a crate 3 m took 1170 J of work. What force was used, in newtons?
  12. 12.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 330 N pushes a cart 6 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 170 N did 680 J of work. How many metres did the object move?
  15. 15.🏋️ Pushing a crate 3 m took 720 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 120 N pushes a cart 8 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 400 N did 1200 J of work. How many metres did the object move?
  20. 20.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 280 N pushes a cart 10 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  23. 23.🏋️ A force of 270 N did 1890 J of work. How many metres did the object move?
  24. 24.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  25. 25.🏋️ A force of 470 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 210 N did 840 J of work. How many metres did the object move?
  27. 27.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  29. 29.🏋️ 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)
  30. 30.🏋️ A force of 330 N pushes a cart 7 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Pushing a crate 2 m took 60 J of work. What force was used, in newtons?
  32. 32.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 260 N pushes a cart 6 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 3 m took 960 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 40 N pushes a cart 1 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Pushing a crate 3 m took 360 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 150 N did 450 J of work. How many metres did the object move?

Answer key

  1. less effort
  2. 9
  3. 4
  4. 50
  5. 600
  6. 340
  7. 2800
  8. 1520
  9. 9
  10. 2
  11. 390
  12. 400
  13. 1980
  14. 4
  15. 240
  16. 960
  17. 650
  18. 100
  19. 3
  20. 20
  21. 2800
  22. through a distance
  23. 7
  24. joule (J)
  25. 940
  26. 4
  27. 280
  28. no, work stays the same
  29. 500
  30. 2310
  31. 30
  32. 2
  33. 1560
  34. 320
  35. 40
  36. 120
  37. 3
  38. 100
  39. 2
  40. 3

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