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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 644 · 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.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A force of 80 N pushes a cart 9 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Pushing a crate 2 m took 280 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 120 N did 240 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 150 N pushes a cart 10 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  8. 8.🏋️ A force of 350 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  11. 11.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Pushing a crate 10 m took 3400 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 490 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
  17. 17.🏋️ Pushing a crate 3 m took 990 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 120 N did 840 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 130 N pushes a cart 4 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ Pushing a crate 1 m took 490 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 280 N pushes a cart 8 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 350 N did 1400 J of work. How many metres did the object move?
  24. 24.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 100 N pushes a cart 1 m along the floor. How much work is done, in joules?
  26. 26.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 240 N did 720 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 240 N pushes a cart 8 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 250 N pushes a cart 8 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  33. 33.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 110 N pushes a cart 9 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 7 m took 980 J of work. What force was used, in newtons?
  36. 36.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Pushing a crate 4 m took 1240 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?

Answer key

  1. 50
  2. 720
  3. 140
  4. 2
  5. 1500
  6. 5
  7. joule (J)
  8. 700
  9. 100
  10. through a distance
  11. 200
  12. 120
  13. 6
  14. 340
  15. 980
  16. no, work stays the same
  17. 330
  18. 7
  19. 520
  20. 4
  21. 490
  22. 2240
  23. 4
  24. 400
  25. 100
  26. 330
  27. 200
  28. 3
  29. 1920
  30. 2000
  31. 6
  32. load ÷ effort
  33. 700
  34. 990
  35. 140
  36. 1000
  37. 450
  38. 310
  39. 100
  40. 2

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