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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 371 · 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 190 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 380 N pushes a cart 8 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
  5. 5.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  7. 7.🏋️ A force of 10 N pushes a cart 8 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  9. 9.🏋️ A force of 490 N did 1960 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 330 N did 990 J of work. How many metres did the object move?
  11. 11.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 320 N did 1920 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 160 N pushes a cart 9 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  15. 15.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 120 N pushes a cart 1 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ 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?
  19. 19.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Pushing a crate 8 m took 1440 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 400 N did 800 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 170 N pushes a cart 4 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 8 m took 2000 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 7 m took 1680 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 10 m took 2000 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 2 m took 120 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 420 N pushes a cart 4 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 3 m took 1170 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 40 N pushes a cart 8 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 150 N pushes a cart 7 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 500 N pushes a cart 5 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 3 m took 480 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 50 N pushes a cart 9 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 40 N pushes a cart 4 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 240 N did 240 J of work. How many metres did the object move?
  40. 40.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?

Answer key

  1. 190
  2. 3040
  3. 2
  4. joule (J)
  5. 250
  6. through a distance
  7. 80
  8. no, work stays the same
  9. 4
  10. 3
  11. 400
  12. 6
  13. 1440
  14. less effort
  15. 750
  16. 120
  17. 700
  18. 160
  19. 4
  20. 850
  21. 180
  22. 2
  23. 680
  24. 250
  25. 240
  26. 200
  27. 60
  28. 1680
  29. 390
  30. 3
  31. 320
  32. 1050
  33. 2500
  34. 160
  35. 4
  36. 400
  37. 450
  38. 160
  39. 1
  40. 2

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