← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 650 · 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 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?
  2. 2.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
  3. 3.🏋️ 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?
  4. 4.🏋️ Pushing a crate 2 m took 360 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 330 N did 3300 J of work. How many metres did the object move?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  7. 7.🏋️ A force of 60 N did 60 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 10 N did 100 J of work. How many metres did the object move?
  10. 10.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  13. 13.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  15. 15.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ 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?
  17. 17.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ Pushing a crate 1 m took 460 J of work. What force was used, in newtons?
  20. 20.🏋️ Pushing a crate 2 m took 460 J of work. What force was used, in newtons?
  21. 21.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 270 N did 540 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  25. 25.🏋️ A force of 420 N pushes a cart 10 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 9 m took 1350 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 7 m took 1330 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 320 N did 2560 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 260 N did 520 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 1 m took 300 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 200 N did 800 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 410 N did 3280 J of work. How many metres did the object move?
  33. 33.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 390 N pushes a cart 7 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 470 N did 940 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 2 m took 160 J of work. What force was used, in newtons?
  37. 37.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 80 N pushes a cart 9 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?

Answer key

  1. 200
  2. less effort
  3. 390
  4. 180
  5. 10
  6. load ÷ effort
  7. 1
  8. 2
  9. 10
  10. 20
  11. 450
  12. joule (J)
  13. 760
  14. through a distance
  15. 120
  16. 640
  17. 750
  18. 720
  19. 460
  20. 230
  21. 100
  22. 2
  23. 150
  24. no, work stays the same
  25. 4200
  26. 150
  27. 190
  28. 8
  29. 2
  30. 300
  31. 4
  32. 8
  33. 450
  34. 2730
  35. 2
  36. 80
  37. 800
  38. 720
  39. 2
  40. 3

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids