← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 169 · 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 machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  3. 3.🏋️ 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?
  4. 4.🏋️ A force of 110 N pushes a cart 3 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  6. 6.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Pushing a crate 1 m took 410 J of work. What force was used, in newtons?
  8. 8.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  9. 9.🏋️ 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?
  10. 10.🏋️ A force of 110 N pushes a cart 5 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  12. 12.🏋️ A force of 130 N pushes a cart 6 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 400 N pushes a cart 4 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 90 N pushes a cart 7 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 30 N pushes a cart 10 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Pushing a crate 1 m took 250 J of work. What force was used, in newtons?
  21. 21.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ Pushing a crate 4 m took 200 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  27. 27.🏋️ Pushing a crate 5 m took 100 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 6 m took 2520 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 160 N did 1440 J of work. How many metres did the object move?
  30. 30.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 470 N did 3290 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 190 N did 380 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 1 m took 170 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 4 m took 160 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 310 N pushes a cart 1 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Pushing a crate 1 m took 470 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 3 m took 540 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?

Answer key

  1. 6
  2. less effort
  3. 90
  4. 330
  5. no, work stays the same
  6. 2
  7. 410
  8. load ÷ effort
  9. 20
  10. 550
  11. through a distance
  12. 780
  13. 60
  14. 1600
  15. 6
  16. 5
  17. 5
  18. 630
  19. 300
  20. 250
  21. 6
  22. 50
  23. 6
  24. 750
  25. 2
  26. joule (J)
  27. 20
  28. 420
  29. 9
  30. 120
  31. 120
  32. 7
  33. 2
  34. 170
  35. 2
  36. 40
  37. 310
  38. 470
  39. 180
  40. 2

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