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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 805 · 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 3 m took 540 J of work. What force was used, in newtons?
  2. 2.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  3. 3.🏋️ A force of 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Pushing a crate 7 m took 1050 J of work. What force was used, in newtons?
  9. 9.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 100 N pushes a cart 4 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 180 N pushes a cart 2 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  16. 16.🏋️ A force of 30 N did 150 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 350 N pushes a cart 1 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 480 N pushes a cart 10 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  23. 23.🏋️ Pushing a crate 9 m took 990 J of work. What force was used, in newtons?
  24. 24.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 100 N did 800 J of work. How many metres did the object move?
  27. 27.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ 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)
  32. 32.🏋️ A force of 240 N pushes a cart 3 m along the floor. How much work is done, in joules?
  33. 33.🏋️ 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?
  34. 34.🏋️ Pushing a crate 10 m took 4600 J of work. What force was used, in newtons?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 10 m took 3200 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 10 m took 1800 J of work. What force was used, in newtons?
  39. 39.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ Pushing a crate 2 m took 920 J of work. What force was used, in newtons?

Answer key

  1. 180
  2. joule (J)
  3. 70
  4. 3
  5. 500
  6. 600
  7. 200
  8. 150
  9. 500
  10. 5
  11. 400
  12. 360
  13. 4
  14. 200
  15. no, work stays the same
  16. 5
  17. 390
  18. 350
  19. 4800
  20. 2
  21. 500
  22. less effort
  23. 110
  24. 2
  25. 2
  26. 8
  27. 2
  28. 3
  29. 650
  30. 200
  31. 550
  32. 720
  33. 200
  34. 460
  35. 300
  36. 2
  37. 320
  38. 180
  39. 60
  40. 460

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