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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 175 · 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 5 m took 1850 J of work. What force was used, in newtons?
  2. 2.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  3. 3.🏋️ A force of 360 N did 1800 J of work. How many metres did the object move?
  4. 4.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Pushing a crate 3 m took 150 J of work. What force was used, in newtons?
  6. 6.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
  7. 7.🏋️ Pushing a crate 5 m took 800 J of work. What force was used, in newtons?
  8. 8.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 6 m took 2100 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 400 N pushes a cart 10 m along the floor. How much work is done, in joules?
  11. 11.🏋️ 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?
  12. 12.🏋️ A force of 370 N did 370 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 160 N pushes a cart 9 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  15. 15.🏋️ A force of 350 N did 2100 J of work. How many metres did the object move?
  16. 16.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 10 N pushes a cart 10 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 310 N pushes a cart 4 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ 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?
  21. 21.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 370 N pushes a cart 3 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 420 N pushes a cart 10 m along the floor. How much work is done, in joules?
  27. 27.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  30. 30.🏋️ A force of 240 N pushes a cart 2 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 50 N did 150 J of work. How many metres did the object move?
  34. 34.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ Pushing a crate 4 m took 440 J of work. What force was used, in newtons?
  36. 36.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 140 N did 980 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 210 N did 630 J of work. How many metres did the object move?
  39. 39.🏋️ A 3 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 2 m took 660 J of work. What force was used, in newtons?

Answer key

  1. 370
  2. joule (J)
  3. 5
  4. 6
  5. 50
  6. no, work stays the same
  7. 160
  8. 4
  9. 350
  10. 4000
  11. 80
  12. 1
  13. 1440
  14. through a distance
  15. 6
  16. 5
  17. 100
  18. 1240
  19. 6
  20. 330
  21. 850
  22. 5
  23. 1110
  24. 70
  25. 350
  26. 4200
  27. 240
  28. 600
  29. load ÷ effort
  30. 480
  31. 250
  32. 250
  33. 3
  34. 300
  35. 110
  36. 210
  37. 7
  38. 3
  39. 150
  40. 330

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