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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 73 · 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 force of 480 N did 960 J of work. How many metres did the object move?
  2. 2.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  5. 5.🏋️ A force of 190 N pushes a cart 4 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 490 N pushes a cart 7 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  10. 10.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Pushing a crate 4 m took 200 J of work. What force was used, in newtons?
  13. 13.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Pushing a crate 8 m took 2000 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 190 N pushes a cart 10 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  17. 17.🏋️ Pushing a crate 7 m took 2170 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 3 m took 1440 J of work. What force was used, in newtons?
  19. 19.🏋️ Pushing a crate 1 m took 340 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 210 N did 1890 J of work. How many metres did the object move?
  21. 21.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  22. 22.🏋️ 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?
  23. 23.🏋️ A force of 250 N did 1250 J of work. How many metres did the object move?
  24. 24.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 430 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 9 m took 3960 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 9 m took 4230 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 120 N did 360 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 3 m took 360 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 290 N pushes a cart 1 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 400 N did 1600 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 340 N did 340 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 290 N did 1740 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 8 m took 1440 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 7 m took 3150 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 2
  2. 220
  3. 900
  4. load ÷ effort
  5. 760
  6. 100
  7. 450
  8. 3430
  9. less effort
  10. 2
  11. 800
  12. 50
  13. 3
  14. 250
  15. 1900
  16. no, work stays the same
  17. 310
  18. 480
  19. 340
  20. 9
  21. joule (J)
  22. 120
  23. 5
  24. 2
  25. 70
  26. 300
  27. 430
  28. 440
  29. 470
  30. 3
  31. 120
  32. 290
  33. 4
  34. 1
  35. 6
  36. 180
  37. 450
  38. 5
  39. 850
  40. 20

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