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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 548 · 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 60 N did 300 J of work. How many metres did the object move?
  2. 2.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Pushing a crate 1 m took 280 J of work. What force was used, in newtons?
  5. 5.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ 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?
  8. 8.🏋️ Pushing a crate 9 m took 4320 J of work. What force was used, in newtons?
  9. 9.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ Pushing a crate 5 m took 1550 J of work. What force was used, in newtons?
  12. 12.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ 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)
  14. 14.🏋️ Pushing a crate 10 m took 1800 J of work. What force was used, in newtons?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  17. 17.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 190 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 250 N did 500 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 180 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ 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
  27. 27.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  28. 28.🏋️ A force of 360 N pushes a cart 9 m along the floor. How much work is done, in joules?
  29. 29.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
  30. 30.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 190 N pushes a cart 6 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 7 m took 1890 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 120 N pushes a cart 9 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 1 m took 360 J of work. What force was used, in newtons?
  36. 36.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 480 N pushes a cart 5 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 490 N pushes a cart 8 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 290 N pushes a cart 6 m along the floor. How much work is done, in joules?

Answer key

  1. 5
  2. 1000
  3. 3
  4. 280
  5. 550
  6. 30
  7. 900
  8. 480
  9. 200
  10. 640
  11. 310
  12. 350
  13. 250
  14. 180
  15. 450
  16. less effort
  17. 6
  18. 380
  19. 400
  20. 4
  21. 5
  22. 5
  23. 5
  24. 2
  25. 360
  26. no, work stays the same
  27. through a distance
  28. 3240
  29. joule (J)
  30. 150
  31. 4
  32. 1140
  33. 270
  34. 1080
  35. 360
  36. 700
  37. 2400
  38. 3920
  39. 50
  40. 1740

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