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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 45 · 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 70 N pushes a cart 2 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  7. 7.🏋️ Pushing a crate 5 m took 2100 J of work. What force was used, in newtons?
  8. 8.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 160 N pushes a cart 5 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
  11. 11.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 1 m took 280 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 470 N did 4700 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 220 N did 440 J of work. How many metres did the object move?
  15. 15.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
  16. 16.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
  17. 17.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 110 N pushes a cart 1 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 120 N did 960 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 10 N did 90 J of work. How many metres did the object move?
  21. 21.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ Pushing a crate 1 m took 380 J of work. What force was used, in newtons?
  26. 26.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ 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)
  28. 28.🏋️ A force of 210 N pushes a cart 7 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 60 N did 300 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 440 N did 440 J of work. How many metres did the object move?
  32. 32.🏋️ Pushing a crate 4 m took 360 J of work. What force was used, in newtons?
  33. 33.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A force of 260 N pushes a cart 10 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 340 N pushes a cart 1 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 120 N pushes a cart 10 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 300 N pushes a cart 4 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 150 N did 150 J of work. How many metres did the object move?

Answer key

  1. 140
  2. 2
  3. 200
  4. 650
  5. 100
  6. joule (J)
  7. 420
  8. 2
  9. 800
  10. through a distance
  11. 5
  12. 280
  13. 10
  14. 2
  15. no, work stays the same
  16. less effort
  17. 5
  18. 110
  19. 8
  20. 9
  21. 50
  22. 4
  23. 5
  24. 150
  25. 380
  26. 4
  27. 250
  28. 1470
  29. 5
  30. 5
  31. 1
  32. 90
  33. 180
  34. 2600
  35. 340
  36. 1200
  37. 1200
  38. 1000
  39. 6
  40. 1

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