← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 477 · 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 100 N did 500 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 310 N did 310 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 180 N did 1260 J of work. How many metres did the object move?
  4. 4.🏋️ A 12 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 machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ 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
  8. 8.🏋️ A force of 370 N did 1480 J of work. How many metres did the object move?
  9. 9.🏋️ Pushing a crate 10 m took 1400 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 430 N did 1290 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 440 N did 880 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 160 N pushes a cart 10 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Pushing a crate 5 m took 850 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 7 m took 1680 J of work. What force was used, in newtons?
  16. 16.🏋️ Pushing a crate 8 m took 2080 J of work. What force was used, in newtons?
  17. 17.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ Pushing a crate 3 m took 840 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 400 N did 800 J of work. How many metres did the object move?
  20. 20.🏋️ 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?
  21. 21.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  22. 22.🏋️ A force of 500 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  24. 24.🏋️ Pushing a crate 3 m took 720 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 8 m took 1200 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 180 N pushes a cart 5 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Pushing a crate 8 m took 400 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 400 N pushes a cart 6 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 2 m took 320 J of work. What force was used, in newtons?
  32. 32.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  35. 35.🏋️ A force of 100 N pushes a cart 3 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 100 N pushes a cart 7 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  38. 38.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  39. 39.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 5
  2. 1
  3. 7
  4. 360
  5. 5
  6. 6
  7. no, work stays the same
  8. 4
  9. 140
  10. 3
  11. 2
  12. 1600
  13. 5
  14. 170
  15. 240
  16. 260
  17. 2
  18. 280
  19. 2
  20. 20
  21. joule (J)
  22. 1500
  23. through a distance
  24. 240
  25. 150
  26. 900
  27. 4
  28. 50
  29. 2400
  30. 4
  31. 160
  32. 800
  33. 6
  34. load ÷ effort
  35. 300
  36. 700
  37. 410
  38. less effort
  39. 100
  40. 300

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