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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 492 · 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 1 m took 140 J of work. What force was used, in newtons?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  3. 3.🏋️ A force of 120 N pushes a cart 8 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Pushing a crate 5 m took 400 J of work. What force was used, in newtons?
  5. 5.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
  6. 6.🏋️ Pushing a crate 2 m took 600 J of work. What force was used, in newtons?
  7. 7.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ 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?
  10. 10.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ 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?
  14. 14.🏋️ Pushing a crate 6 m took 1500 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
  16. 16.🏋️ Pushing a crate 1 m took 90 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
  19. 19.🏋️ Pushing a crate 4 m took 1120 J of work. What force was used, in newtons?
  20. 20.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  22. 22.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ 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)
  24. 24.🏋️ A force of 390 N pushes a cart 5 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 310 N pushes a cart 1 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 320 N did 960 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 490 N did 4900 J of work. How many metres did the object move?
  33. 33.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
  34. 34.🏋️ Pushing a crate 2 m took 800 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 480 N pushes a cart 10 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Pushing a crate 1 m took 340 J of work. What force was used, in newtons?
  39. 39.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ Pushing a crate 8 m took 1360 J of work. What force was used, in newtons?

Answer key

  1. 140
  2. no, work stays the same
  3. 960
  4. 80
  5. joule (J)
  6. 300
  7. 3
  8. 5
  9. 160
  10. 550
  11. 3
  12. 800
  13. 160
  14. 250
  15. 60
  16. 90
  17. 440
  18. less effort
  19. 280
  20. 800
  21. through a distance
  22. 700
  23. 850
  24. 1950
  25. 500
  26. 310
  27. 3
  28. 200
  29. 750
  30. 250
  31. 3
  32. 10
  33. load ÷ effort
  34. 400
  35. 4800
  36. 6
  37. 400
  38. 340
  39. 180
  40. 170

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