← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 444 · 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 240 N pushes a cart 3 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  3. 3.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  4. 4.🏋️ A force of 160 N did 1280 J of work. How many metres did the object move?
  5. 5.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 480 N pushes a cart 3 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 3 m took 870 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 160 N pushes a cart 9 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  13. 13.🏋️ A force of 130 N did 520 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 120 N did 360 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 480 N did 1440 J of work. How many metres did the object move?
  16. 16.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ 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)
  18. 18.🏋️ A force of 70 N pushes a cart 10 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 9 m took 810 J of work. What force was used, in newtons?
  20. 20.🏋️ Pushing a crate 6 m took 1980 J of work. What force was used, in newtons?
  21. 21.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  22. 22.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
  23. 23.🏋️ A force of 380 N pushes a cart 10 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 5 m took 2400 J of work. What force was used, in newtons?
  25. 25.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 260 N pushes a cart 10 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 210 N did 420 J of work. How many metres did the object move?
  31. 31.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 200 N did 1000 J of work. How many metres did the object move?
  33. 33.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Pushing a crate 9 m took 1080 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 360 N pushes a cart 7 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 280 N did 2520 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 9 m took 270 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 140 N did 700 J of work. How many metres did the object move?
  40. 40.🏋️ Pushing a crate 2 m took 220 J of work. What force was used, in newtons?

Answer key

  1. 720
  2. no, work stays the same
  3. through a distance
  4. 8
  5. 4
  6. 1440
  7. 290
  8. 1440
  9. 80
  10. 2
  11. 750
  12. less effort
  13. 4
  14. 3
  15. 3
  16. 350
  17. 300
  18. 700
  19. 90
  20. 330
  21. joule (J)
  22. load ÷ effort
  23. 3800
  24. 480
  25. 30
  26. 900
  27. 2600
  28. 70
  29. 3
  30. 2
  31. 4
  32. 5
  33. 3
  34. 120
  35. 4
  36. 2520
  37. 9
  38. 30
  39. 5
  40. 110

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