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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 379 · 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.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) yes, always (d) only on Mondays
  2. 2.🏋️ A force of 10 N did 50 J of work. How many metres did the object move?
  3. 3.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
  5. 5.🏋️ A force of 480 N did 4320 J of work. How many metres did the object move?
  6. 6.🏋️ Pushing a crate 7 m took 2310 J of work. What force was used, in newtons?
  7. 7.🏋️ A 10 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.🏋️ A force of 330 N pushes a cart 7 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 10 m took 4700 J of work. What force was used, in newtons?
  11. 11.🏋️ Pushing a crate 6 m took 2340 J of work. What force was used, in newtons?
  12. 12.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 220 N pushes a cart 6 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 80 N pushes a cart 1 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 340 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 460 N pushes a cart 5 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  21. 21.🏋️ Pushing a crate 1 m took 340 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 2 m took 760 J of work. What force was used, in newtons?
  23. 23.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  24. 24.🏋️ 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?
  25. 25.🏋️ Pushing a crate 8 m took 2560 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ Pushing a crate 6 m took 1920 J of work. What force was used, in newtons?
  28. 28.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 3 m took 480 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 8 m took 3760 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 290 N pushes a cart 7 m along the floor. How much work is done, in joules?
  32. 32.🏋️ 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?
  33. 33.🏋️ A force of 280 N did 560 J of work. How many metres did the object move?
  34. 34.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ 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?
  36. 36.🏋️ A force of 130 N pushes a cart 2 m along the floor. How much work is done, in joules?
  37. 37.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  38. 38.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 380 N did 2280 J of work. How many metres did the object move?

Answer key

  1. no, work stays the same
  2. 5
  3. 50
  4. less effort
  5. 9
  6. 330
  7. 200
  8. 2310
  9. 4
  10. 470
  11. 390
  12. 3
  13. 6
  14. 110
  15. 200
  16. 1320
  17. 80
  18. 1020
  19. 2300
  20. load ÷ effort
  21. 340
  22. 380
  23. through a distance
  24. 210
  25. 320
  26. 550
  27. 320
  28. 4
  29. 160
  30. 470
  31. 2030
  32. 70
  33. 2
  34. 2
  35. 120
  36. 260
  37. joule (J)
  38. 160
  39. 5
  40. 6

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