← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 282 · 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.🏋️ Pushing a crate 6 m took 900 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 180 N pushes a cart 9 m along the floor. How much work is done, in joules?
  3. 3.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  4. 4.🏋️ A force of 150 N did 1500 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 80 N pushes a cart 8 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 300 N did 2100 J of work. How many metres did the object move?
  7. 7.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
  8. 8.🏋️ A force of 310 N did 1860 J of work. How many metres did the object move?
  9. 9.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
  10. 10.🏋️ A force of 140 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 100 N did 1000 J of work. How many metres did the object move?
  13. 13.🏋️ 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?
  14. 14.🏋️ A force of 100 N did 400 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 80 N did 240 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 480 N did 4320 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 70 N did 560 J of work. How many metres did the object move?
  18. 18.🏋️ Pushing a crate 2 m took 340 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 70 N pushes a cart 4 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 440 N did 440 J of work. How many metres did the object move?
  21. 21.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  23. 23.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ Pushing a crate 1 m took 20 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 40 N pushes a cart 4 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 8 m took 400 J of work. What force was used, in newtons?
  30. 30.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ Pushing a crate 4 m took 1000 J of work. What force was used, in newtons?
  32. 32.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 460 N pushes a cart 10 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ Pushing a crate 2 m took 520 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 90 N pushes a cart 2 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 3 m took 1020 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 130 N did 1300 J of work. How many metres did the object move?
  39. 39.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ Pushing a crate 10 m took 300 J of work. What force was used, in newtons?

Answer key

  1. 150
  2. 1620
  3. joule (J)
  4. 10
  5. 640
  6. 7
  7. through a distance
  8. 6
  9. less effort
  10. 840
  11. 400
  12. 10
  13. 800
  14. 4
  15. 3
  16. 9
  17. 8
  18. 170
  19. 280
  20. 1
  21. 2
  22. no, work stays the same
  23. 3
  24. 2
  25. 1000
  26. 450
  27. 20
  28. 160
  29. 50
  30. 220
  31. 250
  32. 3
  33. 4600
  34. 4
  35. 260
  36. 180
  37. 340
  38. 10
  39. 2
  40. 30

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