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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 90 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🏋️ Pushing a crate 10 m took 3300 J of work. What force was used, in newtons?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  3. 3.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ Pushing a crate 5 m took 400 J of work. What force was used, in newtons?
  7. 7.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  8. 8.🏋️ A force of 430 N did 1720 J of work. How many metres did the object move?
  9. 9.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  11. 11.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?
  12. 12.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, by half (d) yes, always
  14. 14.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 480 N pushes a cart 7 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 390 N pushes a cart 10 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 420 N pushes a cart 5 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ Pushing a crate 10 m took 3900 J of work. What force was used, in newtons?
  23. 23.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  24. 24.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Pushing a crate 3 m took 1080 J of work. What force was used, in newtons?
  28. 28.🏋️ 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?
  29. 29.🏋️ A force of 380 N did 1520 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 470 N did 1410 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 150 N pushes a cart 3 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 420 N pushes a cart 6 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 9 m took 900 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 7 m took 2170 J of work. What force was used, in newtons?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 330
  2. load ÷ effort
  3. 2
  4. 450
  5. 150
  6. 80
  7. joule (J)
  8. 4
  9. 1000
  10. through a distance
  11. 100
  12. 50
  13. no, work stays the same
  14. 4
  15. 400
  16. 3360
  17. 450
  18. 3900
  19. 100
  20. 2100
  21. 2
  22. 390
  23. less effort
  24. 4
  25. 3
  26. 4
  27. 360
  28. 300
  29. 4
  30. 3
  31. 450
  32. 2520
  33. 100
  34. 310
  35. 1000
  36. 5
  37. 700
  38. 800
  39. 6
  40. 500

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