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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 74 · 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 machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ 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?
  3. 3.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ Pushing a crate 10 m took 3600 J of work. What force was used, in newtons?
  5. 5.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 410 N did 1230 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 500 N did 4000 J of work. How many metres did the object move?
  10. 10.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
  11. 11.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  13. 13.🏋️ A force of 100 N pushes a cart 7 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  15. 15.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  18. 18.🏋️ A force of 280 N pushes a cart 6 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  20. 20.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 6 m took 2340 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 350 N pushes a cart 6 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ 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?
  25. 25.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Pushing a crate 6 m took 360 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 8 m took 1040 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 370 N did 1110 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 6 m took 3000 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 200 N pushes a cart 10 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
  33. 33.🏋️ A force of 10 N pushes a cart 8 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 5 m took 2050 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 3 m took 360 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 6 m took 180 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 4 m took 1960 J of work. What force was used, in newtons?

Answer key

  1. 4
  2. 200
  3. 700
  4. 360
  5. 6
  6. 220
  7. 400
  8. 3
  9. 8
  10. 120
  11. 750
  12. no, work stays the same
  13. 700
  14. load ÷ effort
  15. 60
  16. 550
  17. joule (J)
  18. 1680
  19. less effort
  20. 150
  21. 390
  22. 2100
  23. 650
  24. 200
  25. 5
  26. 60
  27. 130
  28. 3
  29. 500
  30. 6
  31. 2000
  32. through a distance
  33. 80
  34. 750
  35. 3
  36. 410
  37. 5
  38. 120
  39. 30
  40. 490

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