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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 316 · 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 150 N pushes a cart 2 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  3. 3.🏋️ Pushing a crate 2 m took 760 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 260 N pushes a cart 3 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  6. 6.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  7. 7.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  8. 8.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 340 N pushes a cart 2 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 120 N did 600 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 210 N pushes a cart 8 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Pushing a crate 4 m took 720 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 240 N pushes a cart 8 m along the floor. How much work is done, in joules?
  14. 14.🏋️ 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)
  15. 15.🏋️ A force of 500 N did 3000 J of work. How many metres did the object move?
  16. 16.🏋️ 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)
  17. 17.🏋️ A force of 450 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A 9 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 100 N did 300 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 470 N pushes a cart 5 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 10 m took 2000 J of work. What force was used, in newtons?
  25. 25.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 100 N did 200 J of work. How many metres did the object move?
  28. 28.🏋️ Pushing a crate 6 m took 2160 J of work. What force was used, in newtons?
  29. 29.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 130 N pushes a cart 9 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 9 m took 1710 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 350 N pushes a cart 4 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  37. 37.🏋️ A force of 180 N did 360 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 40 N pushes a cart 3 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 140 N did 1120 J of work. How many metres did the object move?

Answer key

  1. 300
  2. 90
  3. 380
  4. 780
  5. load ÷ effort
  6. less effort
  7. joule (J)
  8. 2
  9. 680
  10. 5
  11. 1680
  12. 180
  13. 1920
  14. 500
  15. 6
  16. 550
  17. 900
  18. 90
  19. 350
  20. 450
  21. 4
  22. 3
  23. 2350
  24. 200
  25. 5
  26. 410
  27. 2
  28. 360
  29. 850
  30. 600
  31. 550
  32. 2
  33. 1170
  34. 190
  35. 1400
  36. through a distance
  37. 2
  38. 2
  39. 120
  40. 8

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