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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 17 · 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.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  3. 3.🏋️ Pushing a crate 6 m took 60 J of work. What force was used, in newtons?
  4. 4.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 360 N pushes a cart 5 m along the floor. How much work is done, in joules?
  6. 6.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
  7. 7.🏋️ 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)
  8. 8.🏋️ Pushing a crate 2 m took 420 J of work. What force was used, in newtons?
  9. 9.🏋️ A force of 370 N pushes a cart 3 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  11. 11.🏋️ A force of 120 N did 360 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 90 N did 900 J of work. How many metres did the object move?
  13. 13.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ Pushing a crate 2 m took 920 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 160 N did 800 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 500 N pushes a cart 7 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 290 N pushes a cart 5 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ Pushing a crate 7 m took 1330 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 1 m took 30 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 4 m took 1520 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 80 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 5 m took 1400 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 9 m took 450 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 500 N did 4500 J of work. How many metres did the object move?
  27. 27.🏋️ 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)
  28. 28.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 500 N pushes a cart 8 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 9 m took 1350 J of work. What force was used, in newtons?
  31. 31.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 1 m took 50 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 60 N pushes a cart 4 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 430 N pushes a cart 10 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A 7 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 machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. through a distance
  2. no, work stays the same
  3. 10
  4. 800
  5. 1800
  6. joule (J)
  7. 650
  8. 210
  9. 1110
  10. load ÷ effort
  11. 3
  12. 10
  13. 450
  14. 460
  15. 5
  16. 3500
  17. 1450
  18. 120
  19. 350
  20. 190
  21. 30
  22. 380
  23. 160
  24. 280
  25. 50
  26. 9
  27. 550
  28. 6
  29. 4000
  30. 150
  31. 80
  32. 2
  33. 1
  34. 50
  35. 240
  36. 4300
  37. 360
  38. 140
  39. 3
  40. 100

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