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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 930 · 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 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 480 N pushes a cart 2 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 310 N pushes a cart 1 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 260 N did 260 J of work. How many metres did the object move?
  5. 5.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  6. 6.🏋️ A force of 150 N pushes a cart 8 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 170 N pushes a cart 1 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 390 N did 3120 J of work. How many metres did the object move?
  10. 10.🏋️ Pushing a crate 6 m took 2040 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 30 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 480 N did 2880 J of work. How many metres did the object move?
  14. 14.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  16. 16.🏋️ A force of 330 N pushes a cart 1 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 280 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  21. 21.🏋️ A force of 390 N pushes a cart 7 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  26. 26.🏋️ Pushing a crate 4 m took 1640 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 5100 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  29. 29.🏋️ A force of 70 N pushes a cart 7 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 2 m took 360 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 1 m took 420 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 50 N pushes a cart 4 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ Pushing a crate 3 m took 210 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 180 N did 1620 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 160 N did 160 J of work. How many metres did the object move?
  37. 37.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 230 N pushes a cart 6 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 10 m took 1100 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 2 m took 1000 J of work. What force was used, in newtons?

Answer key

  1. 3
  2. 960
  3. 310
  4. 1
  5. joule (J)
  6. 1200
  7. 500
  8. 170
  9. 8
  10. 340
  11. 30
  12. 5
  13. 6
  14. 750
  15. through a distance
  16. 330
  17. 5
  18. 840
  19. 800
  20. less effort
  21. 2730
  22. 3
  23. 650
  24. 6
  25. no, work stays the same
  26. 410
  27. 850
  28. load ÷ effort
  29. 490
  30. 180
  31. 420
  32. 200
  33. 650
  34. 70
  35. 9
  36. 1
  37. 750
  38. 1380
  39. 110
  40. 500

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