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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 319 · 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 600 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A force of 470 N pushes a cart 7 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  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.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  7. 7.🏋️ A force of 40 N pushes a cart 2 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 240 N did 2400 J of work. How many metres did the object move?
  9. 9.🏋️ Pushing a crate 6 m took 2340 J of work. What force was used, in newtons?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  11. 11.🏋️ A force of 60 N did 600 J of work. How many metres did the object move?
  12. 12.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  13. 13.🏋️ Pushing a crate 4 m took 680 J of work. What force was used, in newtons?
  14. 14.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  17. 17.🏋️ A force of 130 N did 520 J of work. How many metres did the object move?
  18. 18.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Pushing a crate 3 m took 450 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 220 N did 1320 J of work. How many metres did the object move?
  22. 22.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 200 N pushes a cart 4 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 420 N did 3360 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 30 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  28. 28.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ 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?
  31. 31.🏋️ A force of 230 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 5 m took 1000 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 50 N pushes a cart 5 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 10 m took 4500 J of work. What force was used, in newtons?
  36. 36.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ Pushing a crate 2 m took 320 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 110 N did 1100 J of work. How many metres did the object move?
  39. 39.🏋️ 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?
  40. 40.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 150
  2. 3290
  3. 90
  4. 300
  5. 3
  6. less effort
  7. 80
  8. 10
  9. 390
  10. load ÷ effort
  11. 10
  12. joule (J)
  13. 170
  14. 250
  15. 3
  16. no, work stays the same
  17. 4
  18. 5
  19. 6
  20. 150
  21. 6
  22. 3
  23. 600
  24. 800
  25. 8
  26. 90
  27. through a distance
  28. 6
  29. 150
  30. 300
  31. 460
  32. 450
  33. 200
  34. 250
  35. 450
  36. 600
  37. 160
  38. 10
  39. 20
  40. 950

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