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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 666 · 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 smooth ramp is 8 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 490 N pushes a cart 6 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  7. 7.🏋️ Pushing a crate 3 m took 1380 J of work. What force was used, in newtons?
  8. 8.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ 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?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  14. 14.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 250 N did 250 J of work. How many metres did the object move?
  16. 16.🏋️ 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?
  17. 17.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 420 N pushes a cart 1 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
  22. 22.🏋️ Pushing a crate 6 m took 2940 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 4 m took 1400 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 50 N pushes a cart 8 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 6 m took 1680 J of work. What force was used, in newtons?
  27. 27.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 8 m took 2400 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 390 N pushes a cart 10 m along the floor. How much work is done, in joules?
  31. 31.🏋️ 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)
  32. 32.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  33. 33.🏋️ Pushing a crate 10 m took 3400 J of work. What force was used, in newtons?
  34. 34.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ Pushing a crate 4 m took 1640 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 130 N did 1040 J of work. How many metres did the object move?
  37. 37.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ 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)
  39. 39.🏋️ Pushing a crate 1 m took 120 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 40 N did 40 J of work. How many metres did the object move?

Answer key

  1. 600
  2. 170
  3. 5
  4. 200
  5. 2940
  6. less effort
  7. 460
  8. 250
  9. 700
  10. 120
  11. 50
  12. 800
  13. joule (J)
  14. 1500
  15. 1
  16. 300
  17. 400
  18. 150
  19. 4
  20. 420
  21. no, work stays the same
  22. 490
  23. 5
  24. 350
  25. 400
  26. 280
  27. 350
  28. 300
  29. 2
  30. 3900
  31. 950
  32. load ÷ effort
  33. 340
  34. 4
  35. 410
  36. 8
  37. 600
  38. 250
  39. 120
  40. 1

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