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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 738 · 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.🏋️ Pushing a crate 1 m took 150 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 340 N pushes a cart 2 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 80 N pushes a cart 9 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Pushing a crate 4 m took 1480 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 320 N pushes a cart 7 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  10. 10.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 290 N did 290 J of work. How many metres did the object move?
  13. 13.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Pushing a crate 9 m took 4500 J of work. What force was used, in newtons?
  15. 15.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  16. 16.🏋️ Pushing a crate 2 m took 840 J of work. What force was used, in newtons?
  17. 17.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  18. 18.🏋️ A force of 390 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 160 N did 1440 J of work. How many metres did the object move?
  20. 20.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ Pushing a crate 9 m took 4410 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 7 m took 980 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 480 N did 2880 J of work. How many metres did the object move?
  24. 24.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ Pushing a crate 2 m took 220 J of work. What force was used, in newtons?
  26. 26.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 500 N pushes a cart 6 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 1 m took 490 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ 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?
  32. 32.🏋️ Pushing a crate 8 m took 2400 J of work. What force was used, in newtons?
  33. 33.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A 13 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.🏋️ Pushing a crate 8 m took 2640 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 100 N pushes a cart 7 m along the floor. How much work is done, in joules?

Answer key

  1. 150
  2. 680
  3. 720
  4. 370
  5. 2240
  6. 2
  7. 270
  8. 2
  9. no, work stays the same
  10. 60
  11. 150
  12. 1
  13. 300
  14. 500
  15. through a distance
  16. 420
  17. joule (J)
  18. 1170
  19. 9
  20. 6
  21. 490
  22. 140
  23. 6
  24. 540
  25. 110
  26. 3
  27. 3000
  28. 5
  29. 490
  30. 650
  31. 100
  32. 300
  33. 50
  34. 6
  35. 2
  36. 3
  37. 520
  38. 330
  39. 750
  40. 700

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