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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 238 · 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 force of 350 N pushes a cart 8 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 260 N pushes a cart 1 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 130 N pushes a cart 1 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 450 N pushes a cart 3 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 150 N pushes a cart 5 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A force of 80 N did 480 J of work. How many metres did the object move?
  9. 9.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 4 m took 160 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 240 N did 1440 J of work. How many metres did the object move?
  12. 12.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  13. 13.🏋️ 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)
  14. 14.🏋️ A force of 320 N did 2880 J of work. How many metres did the object move?
  15. 15.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  16. 16.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  17. 17.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ 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)
  19. 19.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 260 N pushes a cart 10 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ 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
  24. 24.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Pushing a crate 9 m took 4410 J of work. What force was used, in newtons?
  26. 26.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Pushing a crate 3 m took 660 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 9 m took 3060 J of work. What force was used, in newtons?
  29. 29.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 460 N pushes a cart 2 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 50 N did 350 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 2 m took 680 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 460 N did 3680 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 6 m took 900 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 170 N pushes a cart 6 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?

Answer key

  1. 2800
  2. 260
  3. 300
  4. 130
  5. 1350
  6. 750
  7. 80
  8. 6
  9. 3
  10. 40
  11. 6
  12. through a distance
  13. 550
  14. 9
  15. load ÷ effort
  16. joule (J)
  17. 280
  18. 400
  19. 450
  20. 2600
  21. 400
  22. 30
  23. no, work stays the same
  24. 4
  25. 490
  26. 4
  27. 220
  28. 340
  29. 330
  30. 920
  31. 750
  32. 4
  33. 7
  34. 340
  35. 8
  36. 150
  37. 5
  38. 2
  39. 1020
  40. 6

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