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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 897 · 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.🏋️ 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 100 N did 700 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 100 N pushes a cart 5 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 420 N pushes a cart 2 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Pushing a crate 4 m took 360 J of work. What force was used, in newtons?
  6. 6.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
  7. 7.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Pushing a crate 5 m took 900 J of work. What force was used, in newtons?
  9. 9.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ 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?
  11. 11.🏋️ A force of 380 N did 760 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 40 N pushes a cart 5 m along the floor. How much work is done, in joules?
  15. 15.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  16. 16.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 310 N did 3100 J of work. How many metres did the object move?
  20. 20.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 120 N did 1080 J of work. How many metres did the object move?
  22. 22.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  23. 23.🏋️ 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?
  24. 24.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 110 N pushes a cart 7 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 350 N pushes a cart 2 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 190 N did 1710 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 2 m took 60 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 5 m took 1600 J of work. What force was used, in newtons?
  32. 32.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 1 m took 250 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 130 N did 130 J of work. How many metres did the object move?
  35. 35.🏋️ 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?
  36. 36.🏋️ Pushing a crate 5 m took 1400 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 480 N pushes a cart 4 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 320 N pushes a cart 7 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 190 N pushes a cart 1 m along the floor. How much work is done, in joules?

Answer key

  1. through a distance
  2. 7
  3. 500
  4. 840
  5. 90
  6. no, work stays the same
  7. 6
  8. 180
  9. 40
  10. 120
  11. 2
  12. 800
  13. 2
  14. 200
  15. joule (J)
  16. 750
  17. 850
  18. 350
  19. 10
  20. 2
  21. 9
  22. less effort
  23. 90
  24. 5
  25. 3
  26. 770
  27. 700
  28. 900
  29. 9
  30. 30
  31. 320
  32. 250
  33. 250
  34. 1
  35. 340
  36. 280
  37. 1920
  38. 2240
  39. 150
  40. 190

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