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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 193 · 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 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?
  2. 2.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Pushing a crate 3 m took 750 J of work. What force was used, in newtons?
  4. 4.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 400 N did 2800 J of work. How many metres did the object move?
  7. 7.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 480 N did 4800 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 190 N pushes a cart 8 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Pushing a crate 1 m took 30 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 160 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 180 N pushes a cart 1 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 10 N did 100 J of work. How many metres did the object move?
  15. 15.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  16. 16.🏋️ A force of 320 N pushes a cart 5 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 440 N pushes a cart 1 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 330 N pushes a cart 5 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 240 N pushes a cart 9 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ Pushing a crate 2 m took 20 J of work. What force was used, in newtons?
  22. 22.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 400 N pushes a cart 10 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  26. 26.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  29. 29.🏋️ A force of 240 N pushes a cart 8 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 8 m took 1440 J of work. What force was used, in newtons?
  31. 31.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 250 N did 2000 J of work. How many metres did the object move?
  33. 33.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  35. 35.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 320 N pushes a cart 2 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 260 N did 1820 J of work. How many metres did the object move?
  40. 40.🏋️ 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?

Answer key

  1. 200
  2. 6
  3. 250
  4. 80
  5. 4
  6. 7
  7. 950
  8. 10
  9. 1520
  10. 30
  11. 160
  12. 180
  13. 390
  14. 10
  15. no, work stays the same
  16. 1600
  17. 440
  18. 1650
  19. 2160
  20. 4
  21. 10
  22. 500
  23. 4000
  24. 2
  25. less effort
  26. 5
  27. 120
  28. joule (J)
  29. 1920
  30. 180
  31. 60
  32. 8
  33. 270
  34. through a distance
  35. 80
  36. 400
  37. 60
  38. 640
  39. 7
  40. 150

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