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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 214 · 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.

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  1. 1.🏋️ A force of 290 N pushes a cart 2 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 230 N pushes a cart 2 m along the floor. How much work is done, in joules?
  3. 3.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  5. 5.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  6. 6.🏋️ A force of 490 N did 490 J of work. How many metres did the object move?
  7. 7.🏋️ Pushing a crate 9 m took 3330 J of work. What force was used, in newtons?
  8. 8.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A force of 420 N did 1680 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 20 N did 20 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 310 N pushes a cart 5 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 260 N pushes a cart 5 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 180 N did 180 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 260 N pushes a cart 7 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, by half (d) yes, always
  17. 17.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ Pushing a crate 8 m took 3280 J of work. What force was used, in newtons?
  20. 20.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  21. 21.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  22. 22.🏋️ A force of 20 N did 80 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Pushing a crate 5 m took 300 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 80 N did 240 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 400 N pushes a cart 7 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 470 N did 2350 J of work. How many metres did the object move?
  29. 29.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 160 N did 160 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 220 N pushes a cart 7 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ Pushing a crate 3 m took 1470 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 220 N did 1320 J of work. How many metres did the object move?
  35. 35.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 230 N pushes a cart 8 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 310 N did 1240 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 380 N pushes a cart 9 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 580
  2. 460
  3. 240
  4. through a distance
  5. joule (J)
  6. 1
  7. 370
  8. 180
  9. 4
  10. 1
  11. 1550
  12. 5
  13. 1300
  14. 1
  15. 1820
  16. no, work stays the same
  17. 480
  18. 90
  19. 410
  20. load ÷ effort
  21. less effort
  22. 4
  23. 4
  24. 2
  25. 60
  26. 3
  27. 2800
  28. 5
  29. 250
  30. 1
  31. 1540
  32. 140
  33. 490
  34. 6
  35. 750
  36. 210
  37. 1840
  38. 4
  39. 3420
  40. 10

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