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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 525 · 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) without moving it (b) only upwards (c) very slowly (d) through a distance
  2. 2.🏋️ A force of 90 N pushes a cart 1 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Pushing a crate 6 m took 2220 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 430 N pushes a cart 1 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Pushing a crate 3 m took 960 J of work. What force was used, in newtons?
  9. 9.🏋️ A force of 230 N pushes a cart 4 m along the floor. How much work is done, in joules?
  10. 10.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
  11. 11.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  14. 14.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 100 N pushes a cart 7 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 230 N pushes a cart 5 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  19. 19.🏋️ 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)
  20. 20.🏋️ Pushing a crate 8 m took 2080 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 150 N did 600 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 110 N did 1100 J of work. How many metres did the object move?
  23. 23.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 10 N pushes a cart 1 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 6 m took 2400 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 100 N did 700 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 390 N pushes a cart 3 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 470 N did 3760 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 10 m took 3500 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 470 N did 940 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ 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?
  36. 36.🏋️ Pushing a crate 5 m took 1100 J of work. What force was used, in newtons?
  37. 37.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 210 N did 840 J of work. How many metres did the object move?
  40. 40.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. through a distance
  2. 90
  3. 370
  4. 430
  5. 5
  6. 450
  7. 3
  8. 320
  9. 920
  10. joule (J)
  11. 300
  12. 4
  13. no, work stays the same
  14. 800
  15. 700
  16. 4
  17. 1150
  18. load ÷ effort
  19. 450
  20. 260
  21. 4
  22. 10
  23. 50
  24. 10
  25. 400
  26. 200
  27. 7
  28. 1170
  29. 4
  30. 8
  31. 350
  32. 2
  33. 60
  34. 6
  35. 450
  36. 220
  37. 900
  38. 2
  39. 4
  40. 30

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