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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 962 · 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 470 N pushes a cart 3 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 430 N pushes a cart 4 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
  4. 4.🏋️ A force of 220 N did 660 J of work. How many metres did the object move?
  5. 5.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  6. 6.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Pushing a crate 3 m took 900 J of work. What force was used, in newtons?
  8. 8.🏋️ Pushing a crate 3 m took 750 J of work. What force was used, in newtons?
  9. 9.🏋️ Pushing a crate 5 m took 2250 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 200 N pushes a cart 10 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 30 N did 270 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 500 N did 1000 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 90 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A 16 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.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ Pushing a crate 7 m took 2100 J of work. What force was used, in newtons?
  17. 17.🏋️ 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?
  18. 18.🏋️ A force of 100 N did 1000 J of work. How many metres did the object move?
  19. 19.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  20. 20.🏋️ A 4 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 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 320 N pushes a cart 10 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Pushing a crate 5 m took 500 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 360 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  30. 30.🏋️ A force of 340 N pushes a cart 9 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Pushing a crate 6 m took 540 J of work. What force was used, in newtons?
  32. 32.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ Pushing a crate 3 m took 540 J of work. What force was used, in newtons?
  35. 35.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 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.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A force of 150 N did 1500 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 70 N did 210 J of work. How many metres did the object move?

Answer key

  1. 1410
  2. 1720
  3. through a distance
  4. 3
  5. joule (J)
  6. 900
  7. 300
  8. 250
  9. 450
  10. 2000
  11. 9
  12. 2
  13. 180
  14. 160
  15. 200
  16. 300
  17. 250
  18. 10
  19. load ÷ effort
  20. 160
  21. 60
  22. 3200
  23. 1000
  24. 300
  25. 600
  26. 100
  27. 360
  28. 6
  29. less effort
  30. 3060
  31. 90
  32. 650
  33. 50
  34. 180
  35. 50
  36. 2
  37. 180
  38. 240
  39. 10
  40. 3

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