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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 847 · 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 8 m took 80 J of work. What force was used, in newtons?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  3. 3.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  5. 5.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 420 N pushes a cart 5 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 280 N did 1400 J of work. How many metres did the object move?
  8. 8.🏋️ Pushing a crate 4 m took 720 J of work. What force was used, in newtons?
  9. 9.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Pushing a crate 4 m took 800 J of work. What force was used, in newtons?
  12. 12.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
  15. 15.🏋️ A force of 230 N did 1840 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 40 N pushes a cart 5 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
  19. 19.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 370 N pushes a cart 1 m along the floor. How much work is done, in joules?
  22. 22.🏋️ 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?
  23. 23.🏋️ Pushing a crate 6 m took 1800 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 400 N did 1200 J of work. How many metres did the object move?
  25. 25.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  26. 26.🏋️ Pushing a crate 6 m took 1920 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 5 m took 2100 J of work. What force was used, in newtons?
  28. 28.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 190 N did 380 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 140 N did 700 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 70 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 120 N did 1200 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 410 N did 410 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 170 N did 340 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 4 m took 880 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 160 N pushes a cart 8 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 10 m took 2600 J of work. What force was used, in newtons?

Answer key

  1. 10
  2. load ÷ effort
  3. 6
  4. less effort
  5. 200
  6. 2100
  7. 5
  8. 180
  9. 600
  10. 3
  11. 200
  12. 5
  13. 2
  14. no, work stays the same
  15. 8
  16. 200
  17. 160
  18. joule (J)
  19. 160
  20. 6
  21. 370
  22. 120
  23. 300
  24. 3
  25. through a distance
  26. 320
  27. 420
  28. 170
  29. 50
  30. 4
  31. 2
  32. 5
  33. 70
  34. 280
  35. 10
  36. 1
  37. 2
  38. 220
  39. 1280
  40. 260

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