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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 556 · 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 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?
  2. 2.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A force of 90 N pushes a cart 3 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Pushing a crate 7 m took 2310 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 220 N did 440 J of work. How many metres did the object move?
  6. 6.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 370 N did 2590 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 280 N did 560 J of work. How many metres did the object move?
  10. 10.🏋️ Pushing a crate 1 m took 190 J of work. What force was used, in newtons?
  11. 11.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  13. 13.🏋️ A force of 90 N pushes a cart 6 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Pushing a crate 9 m took 2880 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 30 N did 180 J of work. How many metres did the object move?
  19. 19.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  20. 20.🏋️ A force of 490 N did 2940 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 480 N pushes a cart 2 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ Pushing a crate 10 m took 200 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 330 N did 3300 J of work. How many metres did the object move?
  25. 25.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  26. 26.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  28. 28.🏋️ A force of 10 N pushes a cart 9 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 30 N did 30 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 420 N did 2940 J of work. How many metres did the object move?
  32. 32.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ Pushing a crate 2 m took 580 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 320 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 370 N pushes a cart 1 m along the floor. How much work is done, in joules?

Answer key

  1. 100
  2. 250
  3. 270
  4. 330
  5. 2
  6. 2
  7. 1000
  8. 7
  9. 2
  10. 190
  11. 500
  12. joule (J)
  13. 540
  14. 90
  15. 480
  16. 3
  17. 320
  18. 6
  19. less effort
  20. 6
  21. 960
  22. 50
  23. 20
  24. 10
  25. through a distance
  26. 3
  27. no, work stays the same
  28. 90
  29. 6
  30. 1
  31. 7
  32. 600
  33. 290
  34. 650
  35. 6
  36. 960
  37. 6
  38. 650
  39. 2
  40. 370

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