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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 890 · 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 450 N pushes a cart 10 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 150 N did 750 J of work. How many metres did the object move?
  3. 3.🏋️ Pushing a crate 2 m took 840 J of work. What force was used, in newtons?
  4. 4.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ 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?
  8. 8.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A force of 340 N pushes a cart 8 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  11. 11.🏋️ A force of 500 N did 500 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 300 N did 300 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 350 N pushes a cart 1 m along the floor. How much work is done, in joules?
  14. 14.🏋️ 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?
  15. 15.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 350 N pushes a cart 4 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Pushing a crate 3 m took 1200 J of work. What force was used, in newtons?
  18. 18.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 490 N pushes a cart 6 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  21. 21.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
  22. 22.🏋️ A force of 80 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 190 N did 1520 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 140 N pushes a cart 4 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 230 N did 1610 J of work. How many metres did the object move?
  26. 26.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ 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?
  28. 28.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 20 N did 100 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  33. 33.🏋️ A force of 360 N pushes a cart 10 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 130 N pushes a cart 9 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 2 m took 100 J of work. What force was used, in newtons?
  37. 37.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
  38. 38.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?

Answer key

  1. 4500
  2. 5
  3. 420
  4. 300
  5. 220
  6. 5
  7. 260
  8. 100
  9. 2720
  10. through a distance
  11. 1
  12. 1
  13. 350
  14. 300
  15. 300
  16. 1400
  17. 400
  18. 2
  19. 2940
  20. load ÷ effort
  21. less effort
  22. 240
  23. 8
  24. 560
  25. 7
  26. 20
  27. 200
  28. 950
  29. 5
  30. 6
  31. 5
  32. joule (J)
  33. 3600
  34. 1170
  35. 6
  36. 50
  37. no, work stays the same
  38. 200
  39. 750
  40. 6

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