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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 304 · 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 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 190 N did 190 J of work. How many metres did the object move?
  5. 5.🏋️ Pushing a crate 1 m took 100 J of work. What force was used, in newtons?
  6. 6.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ Pushing a crate 2 m took 80 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  11. 11.🏋️ Pushing a crate 5 m took 1700 J of work. What force was used, in newtons?
  12. 12.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 350 N pushes a cart 3 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  19. 19.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) metre (m) (d) watt hour
  20. 20.🏋️ A force of 20 N pushes a cart 9 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 8 m took 2400 J of work. What force was used, in newtons?
  22. 22.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ Pushing a crate 1 m took 270 J of work. What force was used, in newtons?
  26. 26.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
  27. 27.🏋️ Pushing a crate 4 m took 120 J of work. What force was used, in newtons?
  28. 28.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 200 N pushes a cart 7 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  34. 34.🏋️ A force of 390 N pushes a cart 3 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 2 m took 620 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 490 N did 1470 J of work. How many metres did the object move?
  37. 37.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 290 N did 2610 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 310 N pushes a cart 8 m along the floor. How much work is done, in joules?

Answer key

  1. 360
  2. 5
  3. 300
  4. 1
  5. 100
  6. 800
  7. 240
  8. 40
  9. 4
  10. load ÷ effort
  11. 340
  12. 6
  13. 5
  14. 5
  15. 120
  16. 1050
  17. 700
  18. no, work stays the same
  19. joule (J)
  20. 180
  21. 300
  22. 850
  23. 4
  24. 760
  25. 270
  26. less effort
  27. 30
  28. 5
  29. 150
  30. 6
  31. 300
  32. 1400
  33. through a distance
  34. 1170
  35. 310
  36. 3
  37. 6
  38. 4
  39. 9
  40. 2480

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