← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 494 · 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 170 N pushes a cart 8 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 500 N pushes a cart 8 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  5. 5.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  6. 6.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 480 N pushes a cart 7 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  9. 9.🏋️ A force of 70 N did 140 J of work. How many metres did the object move?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  11. 11.🏋️ Pushing a crate 5 m took 150 J of work. What force was used, in newtons?
  12. 12.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 380 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ 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)
  15. 15.🏋️ Pushing a crate 2 m took 120 J of work. What force was used, in newtons?
  16. 16.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Pushing a crate 2 m took 520 J of work. What force was used, in newtons?
  18. 18.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 260 N pushes a cart 8 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 1 m took 90 J of work. What force was used, in newtons?
  22. 22.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 7 m took 1330 J of work. What force was used, in newtons?
  25. 25.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
  26. 26.🏋️ A force of 180 N did 180 J of work. How many metres did the object move?
  27. 27.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  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 force of 270 N did 2160 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 3 m took 1080 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 2 m took 560 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 2 m took 480 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 110 N pushes a cart 8 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 10 m took 3900 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 170 N did 850 J of work. How many metres did the object move?
  36. 36.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 9 m took 3780 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 1 m took 130 J of work. What force was used, in newtons?
  39. 39.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 1360
  2. 4000
  3. 750
  4. less effort
  5. joule (J)
  6. 160
  7. 3360
  8. through a distance
  9. 2
  10. load ÷ effort
  11. 30
  12. 3
  13. 760
  14. 200
  15. 60
  16. 300
  17. 260
  18. 2
  19. 4
  20. 2080
  21. 90
  22. 2
  23. 4
  24. 190
  25. no, work stays the same
  26. 1
  27. 40
  28. 200
  29. 8
  30. 360
  31. 280
  32. 240
  33. 880
  34. 390
  35. 5
  36. 3
  37. 420
  38. 130
  39. 2
  40. 90

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