← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 996 · 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 longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  2. 2.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  3. 3.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  4. 4.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
  6. 6.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  8. 8.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A force of 490 N did 3430 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 220 N pushes a cart 8 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Pushing a crate 7 m took 1050 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 110 N pushes a cart 9 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Pushing a crate 10 m took 1300 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 230 N did 2300 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 9 m took 1530 J of work. What force was used, in newtons?
  20. 20.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Pushing a crate 5 m took 1800 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 190 N pushes a cart 8 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 2 m took 920 J of work. What force was used, in newtons?
  25. 25.🏋️ A 12 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 250 N did 2000 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 350 N pushes a cart 3 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 450 N did 1800 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 60 N pushes a cart 3 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 300 N did 2400 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 400 N did 3600 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 140 N pushes a cart 8 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Pushing a crate 6 m took 300 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 480 N pushes a cart 3 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?

Answer key

  1. less effort
  2. joule (J)
  3. through a distance
  4. 2
  5. no, work stays the same
  6. 250
  7. load ÷ effort
  8. 200
  9. 7
  10. 1760
  11. 6
  12. 190
  13. 500
  14. 150
  15. 990
  16. 50
  17. 130
  18. 10
  19. 170
  20. 850
  21. 350
  22. 360
  23. 1520
  24. 460
  25. 480
  26. 8
  27. 1050
  28. 4
  29. 180
  30. 8
  31. 9
  32. 1120
  33. 50
  34. 300
  35. 1080
  36. 50
  37. 4
  38. 5
  39. 1440
  40. 5

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