← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 854 · 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.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  2. 2.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
  3. 3.🏋️ A force of 410 N pushes a cart 10 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  5. 5.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A force of 150 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 2 m took 400 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 150 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 240 N pushes a cart 3 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 90 N did 90 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 180 N pushes a cart 5 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  16. 16.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ 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)
  18. 18.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Pushing a crate 4 m took 400 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Pushing a crate 2 m took 660 J of work. What force was used, in newtons?
  26. 26.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 40 N did 200 J of work. How many metres did the object move?
  28. 28.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 170 N did 1190 J of work. How many metres did the object move?
  30. 30.🏋️ 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?
  31. 31.🏋️ A 16 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 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 270 N did 2700 J of work. How many metres did the object move?
  37. 37.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
  40. 40.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)

Answer key

  1. load ÷ effort
  2. through a distance
  3. 4100
  4. less effort
  5. 260
  6. 800
  7. 140
  8. 1200
  9. 200
  10. 900
  11. 720
  12. 1
  13. 900
  14. 570
  15. no, work stays the same
  16. 300
  17. 350
  18. 3
  19. 100
  20. 6
  21. 2
  22. 1000
  23. 6
  24. 850
  25. 330
  26. 300
  27. 5
  28. 200
  29. 7
  30. 90
  31. 480
  32. 160
  33. 900
  34. 150
  35. 600
  36. 10
  37. 150
  38. 3
  39. 200
  40. joule (J)

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