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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 531 · 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 10 m took 3800 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 380 N did 1140 J of work. How many metres did the object move?
  4. 4.🏋️ 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?
  5. 5.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 270 N pushes a cart 5 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) effort ÷ load (d) load × effort
  10. 10.🏋️ Pushing a crate 5 m took 800 J of work. What force was used, in newtons?
  11. 11.🏋️ Pushing a crate 10 m took 4500 J of work. What force was used, in newtons?
  12. 12.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  13. 13.🏋️ A force of 490 N pushes a cart 4 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 450 N did 2250 J of work. How many metres did the object move?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 380 N did 3040 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 330 N pushes a cart 7 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A force of 20 N did 20 J of work. How many metres did the object move?
  21. 21.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  22. 22.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  24. 24.🏋️ A force of 230 N did 1610 J of work. How many metres did the object move?
  25. 25.🏋️ Pushing a crate 7 m took 420 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
  31. 31.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 4 m took 1360 J of work. What force was used, in newtons?
  34. 34.🏋️ 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)
  35. 35.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 5 m took 1600 J of work. What force was used, in newtons?
  37. 37.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Pushing a crate 8 m took 3520 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 120 N pushes a cart 5 m along the floor. How much work is done, in joules?

Answer key

  1. 380
  2. 390
  3. 3
  4. 180
  5. 440
  6. 5
  7. 1350
  8. 2
  9. load ÷ effort
  10. 160
  11. 450
  12. through a distance
  13. 1960
  14. 5
  15. 1000
  16. 4
  17. 8
  18. 2310
  19. 250
  20. 1
  21. less effort
  22. 150
  23. no, work stays the same
  24. 7
  25. 60
  26. 1260
  27. 100
  28. 3
  29. 5
  30. joule (J)
  31. 3
  32. 6
  33. 340
  34. 750
  35. 3
  36. 320
  37. 850
  38. 3
  39. 440
  40. 600

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