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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 488 · 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 force of 90 N did 270 J of work. How many metres did the object move?
  3. 3.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ Pushing a crate 8 m took 1760 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 80 N did 800 J of work. How many metres did the object move?
  9. 9.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ Pushing a crate 5 m took 1250 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 150 N did 1500 J of work. How many metres did the object move?
  12. 12.🏋️ 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)
  13. 13.🏋️ A force of 20 N pushes a cart 1 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  15. 15.🏋️ A force of 10 N did 10 J of work. How many metres did the object move?
  16. 16.🏋️ Pushing a crate 3 m took 630 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 110 N pushes a cart 4 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 410 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 5 m took 50 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 280 N pushes a cart 8 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Pushing a crate 6 m took 480 J of work. What force was used, in newtons?
  23. 23.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  25. 25.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ Pushing a crate 4 m took 200 J of work. What force was used, in newtons?
  27. 27.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 70 N pushes a cart 6 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 30 N did 300 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 30 N did 90 J of work. How many metres did the object move?
  32. 32.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  33. 33.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 430 N did 430 J of work. How many metres did the object move?
  39. 39.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?

Answer key

  1. 6
  2. 3
  3. 2
  4. 2
  5. 260
  6. 360
  7. 220
  8. 10
  9. 200
  10. 250
  11. 10
  12. 850
  13. 20
  14. less effort
  15. 1
  16. 210
  17. 440
  18. 1230
  19. 10
  20. 2240
  21. 200
  22. 80
  23. 250
  24. no, work stays the same
  25. 300
  26. 50
  27. 350
  28. 2
  29. 420
  30. 10
  31. 3
  32. through a distance
  33. 5
  34. 320
  35. 450
  36. 110
  37. 800
  38. 1
  39. 2
  40. 6

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