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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 995 · 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 500 N did 4500 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 90 N pushes a cart 2 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ 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)
  8. 8.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 20 N did 40 J of work. How many metres did the object move?
  14. 14.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  16. 16.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  17. 17.🏋️ 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)
  18. 18.🏋️ Pushing a crate 6 m took 360 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 270 N pushes a cart 2 m along the floor. How much work is done, in joules?
  20. 20.🏋️ 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?
  21. 21.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
  22. 22.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  26. 26.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 310 N pushes a cart 2 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 20 N pushes a cart 10 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 280 N did 2520 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 3 m took 1020 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 8 m took 3440 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 320 N did 320 J of work. How many metres did the object move?
  35. 35.🏋️ Pushing a crate 6 m took 2100 J of work. What force was used, in newtons?
  36. 36.🏋️ A 10 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 force of 40 N pushes a cart 6 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 280 N pushes a cart 3 m along the floor. How much work is done, in joules?
  39. 39.🏋️ 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)
  40. 40.🏋️ A force of 140 N did 1260 J of work. How many metres did the object move?

Answer key

  1. 9
  2. 210
  3. 180
  4. 700
  5. 5
  6. 3
  7. 650
  8. 340
  9. 300
  10. 350
  11. 1000
  12. 2
  13. 2
  14. 50
  15. through a distance
  16. joule (J)
  17. 850
  18. 60
  19. 540
  20. 260
  21. less effort
  22. 2
  23. 150
  24. 190
  25. no, work stays the same
  26. 2
  27. 620
  28. 200
  29. 9
  30. 5
  31. 6
  32. 340
  33. 430
  34. 1
  35. 350
  36. 100
  37. 240
  38. 840
  39. 550
  40. 9

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