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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 762 · 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.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
  3. 3.🏋️ A force of 420 N did 420 J of work. How many metres did the object move?
  4. 4.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  6. 6.🏋️ A force of 400 N did 400 J of work. How many metres did the object move?
  7. 7.🏋️ Pushing a crate 2 m took 980 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 490 N pushes a cart 5 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  11. 11.🏋️ Pushing a crate 7 m took 210 J of work. What force was used, in newtons?
  12. 12.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 70 N did 700 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 130 N pushes a cart 10 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Pushing a crate 8 m took 1200 J of work. What force was used, in newtons?
  17. 17.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 480 N pushes a cart 10 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 410 N did 820 J of work. How many metres did the object move?
  20. 20.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ 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)
  24. 24.🏋️ A force of 290 N pushes a cart 7 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 2 m took 100 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 420 N pushes a cart 10 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 480 N did 960 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 380 N did 380 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 420 N did 3360 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A 17 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 force of 310 N did 1240 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 70 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 340 N pushes a cart 8 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 40 N did 240 J of work. How many metres did the object move?
  36. 36.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 140 N pushes a cart 5 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ 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?
  40. 40.🏋️ Pushing a crate 4 m took 1520 J of work. What force was used, in newtons?

Answer key

  1. no, work stays the same
  2. load ÷ effort
  3. 1
  4. 4
  5. joule (J)
  6. 1
  7. 490
  8. 2450
  9. 4
  10. through a distance
  11. 30
  12. 2
  13. 10
  14. 1300
  15. 30
  16. 150
  17. 550
  18. 4800
  19. 2
  20. 900
  21. 190
  22. 1000
  23. 200
  24. 2030
  25. 50
  26. 4200
  27. 2
  28. 1
  29. 8
  30. 4
  31. 340
  32. 4
  33. 70
  34. 2720
  35. 6
  36. 90
  37. 700
  38. 700
  39. 450
  40. 380

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