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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 31 · 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.🏋️ A force of 420 N did 1260 J of work. How many metres did the object move?
  2. 2.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 240 N pushes a cart 5 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A 13 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 110 N pushes a cart 8 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Pushing a crate 2 m took 840 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 20 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ 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?
  10. 10.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  11. 11.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ 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
  13. 13.🏋️ A force of 280 N did 840 J of work. How many metres did the object move?
  14. 14.🏋️ 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?
  15. 15.🏋️ A force of 430 N pushes a cart 9 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 490 N pushes a cart 1 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  18. 18.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A 6 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.🏋️ A force of 150 N pushes a cart 4 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 240 N pushes a cart 1 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Pushing a crate 10 m took 1700 J of work. What force was used, in newtons?
  24. 24.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  25. 25.🏋️ 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?
  26. 26.🏋️ Pushing a crate 8 m took 80 J of work. What force was used, in newtons?
  27. 27.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 10 m took 1800 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 3 m took 330 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 500 N did 1000 J of work. How many metres did the object move?
  31. 31.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 380 N did 1520 J of work. How many metres did the object move?
  33. 33.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 490 N pushes a cart 7 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 490 N pushes a cart 2 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 270 N pushes a cart 5 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 3 m took 900 J of work. What force was used, in newtons?

Answer key

  1. 3
  2. 5
  3. 1200
  4. 390
  5. 880
  6. 200
  7. 420
  8. 40
  9. 50
  10. through a distance
  11. 2
  12. no, work stays the same
  13. 3
  14. 170
  15. 3870
  16. 490
  17. less effort
  18. 3
  19. 2
  20. 240
  21. 600
  22. 240
  23. 170
  24. joule (J)
  25. 210
  26. 10
  27. 1000
  28. 180
  29. 110
  30. 2
  31. 640
  32. 4
  33. 2
  34. 3430
  35. 300
  36. 980
  37. 600
  38. 450
  39. 1350
  40. 300

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