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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 572 · 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.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  2. 2.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 260 N pushes a cart 2 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
  6. 6.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Pushing a crate 2 m took 340 J of work. What force was used, in newtons?
  8. 8.🏋️ Pushing a crate 10 m took 3100 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A 6 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.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  12. 12.🏋️ A force of 370 N did 3700 J of work. How many metres did the object move?
  13. 13.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ Pushing a crate 2 m took 1000 J of work. What force was used, in newtons?
  15. 15.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  17. 17.🏋️ Pushing a crate 6 m took 1200 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 320 N pushes a cart 6 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 30 N pushes a cart 5 m along the floor. How much work is done, in joules?
  20. 20.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 480 N pushes a cart 10 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 50 N did 100 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 220 N did 1980 J of work. How many metres did the object move?
  25. 25.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 190 N did 1140 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 10 N did 10 J of work. How many metres did the object move?
  28. 28.🏋️ Pushing a crate 1 m took 140 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 4 m took 80 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 10 N did 100 J of work. How many metres did the object move?
  32. 32.🏋️ 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
  33. 33.🏋️ Pushing a crate 6 m took 2640 J of work. What force was used, in newtons?
  34. 34.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 390 N pushes a cart 3 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Pushing a crate 4 m took 280 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 7 m took 840 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 240 N pushes a cart 4 m along the floor. How much work is done, in joules?

Answer key

  1. load ÷ effort
  2. 4
  3. 520
  4. 5
  5. less effort
  6. 850
  7. 170
  8. 310
  9. 4
  10. 240
  11. joule (J)
  12. 10
  13. 360
  14. 500
  15. 300
  16. through a distance
  17. 200
  18. 1920
  19. 150
  20. 320
  21. 6
  22. 4800
  23. 2
  24. 9
  25. 500
  26. 6
  27. 1
  28. 140
  29. 20
  30. 5
  31. 10
  32. no, work stays the same
  33. 440
  34. 560
  35. 150
  36. 600
  37. 1170
  38. 70
  39. 120
  40. 960

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