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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 208 · 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 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ 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?
  3. 3.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  4. 4.🏋️ A force of 490 N did 1470 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 230 N pushes a cart 3 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 340 N did 2720 J of work. How many metres did the object move?
  7. 7.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  8. 8.🏋️ A force of 330 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 220 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 420 N did 420 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 80 N did 560 J of work. How many metres did the object move?
  13. 13.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 220 N did 660 J of work. How many metres did the object move?
  15. 15.🏋️ Pushing a crate 10 m took 1900 J of work. What force was used, in newtons?
  16. 16.🏋️ 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)
  17. 17.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ Pushing a crate 9 m took 3780 J of work. What force was used, in newtons?
  19. 19.🏋️ Pushing a crate 7 m took 2660 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 40 N pushes a cart 7 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 190 N did 1710 J of work. How many metres did the object move?
  22. 22.🏋️ Pushing a crate 4 m took 760 J of work. What force was used, in newtons?
  23. 23.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  25. 25.🏋️ 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)
  26. 26.🏋️ A force of 300 N did 900 J of work. How many metres did the object move?
  27. 27.🏋️ Pushing a crate 7 m took 2240 J of work. What force was used, in newtons?
  28. 28.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A force of 60 N did 60 J of work. How many metres did the object move?
  30. 30.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 1 m took 160 J of work. What force was used, in newtons?
  34. 34.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
  35. 35.🏋️ Pushing a crate 10 m took 3700 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 200 N pushes a cart 5 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 440 N did 4400 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 170 N pushes a cart 2 m along the floor. How much work is done, in joules?

Answer key

  1. 550
  2. 480
  3. through a distance
  4. 3
  5. 690
  6. 8
  7. joule (J)
  8. 660
  9. 800
  10. 1320
  11. 1
  12. 7
  13. 5
  14. 3
  15. 190
  16. 800
  17. 5
  18. 420
  19. 380
  20. 280
  21. 9
  22. 190
  23. 650
  24. load ÷ effort
  25. 250
  26. 3
  27. 320
  28. 320
  29. 1
  30. 20
  31. 600
  32. 550
  33. 160
  34. less effort
  35. 370
  36. 1000
  37. 10
  38. 4
  39. 700
  40. 340

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