← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 921 · 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 smooth ramp is 9 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  3. 3.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
  4. 4.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 30 N pushes a cart 8 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Pushing a crate 4 m took 680 J of work. What force was used, in newtons?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  10. 10.🏋️ 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?
  11. 11.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  12. 12.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  13. 13.🏋️ Pushing a crate 6 m took 2160 J of work. What force was used, in newtons?
  14. 14.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 250 N pushes a cart 10 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Pushing a crate 3 m took 1080 J of work. What force was used, in newtons?
  18. 18.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A 3 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.🏋️ A force of 220 N pushes a cart 8 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 7 m took 3290 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 20 N pushes a cart 6 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 30 N did 90 J of work. How many metres did the object move?
  25. 25.🏋️ Pushing a crate 1 m took 180 J of work. What force was used, in newtons?
  26. 26.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 360 N did 2880 J of work. How many metres did the object move?
  29. 29.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ Pushing a crate 8 m took 3440 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 240 N did 720 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 140 N pushes a cart 6 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A 17 kg box is lifted straight up by 1 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 3 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 10 m took 4300 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 40 N did 200 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ Pushing a crate 3 m took 570 J of work. What force was used, in newtons?

Answer key

  1. 300
  2. less effort
  3. no, work stays the same
  4. 2
  5. 3
  6. 240
  7. 250
  8. 170
  9. load ÷ effort
  10. 300
  11. joule (J)
  12. through a distance
  13. 360
  14. 3
  15. 2500
  16. 3
  17. 360
  18. 4
  19. 6
  20. 30
  21. 1760
  22. 470
  23. 120
  24. 3
  25. 180
  26. 280
  27. 50
  28. 8
  29. 100
  30. 430
  31. 3
  32. 840
  33. 170
  34. 550
  35. 2
  36. 430
  37. 5
  38. 3
  39. 200
  40. 190

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