← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 447 · 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 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ Pushing a crate 8 m took 1120 J of work. What force was used, in newtons?
  3. 3.🏋️ 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?
  4. 4.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  5. 5.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 180 N did 720 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  10. 10.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Pushing a crate 1 m took 130 J of work. What force was used, in newtons?
  12. 12.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  13. 13.🏋️ Pushing a crate 2 m took 480 J of work. What force was used, in newtons?
  14. 14.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  15. 15.🏋️ A force of 470 N pushes a cart 8 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Pushing a crate 4 m took 320 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 120 N did 240 J of work. How many metres did the object move?
  18. 18.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 400 N did 2400 J of work. How many metres did the object move?
  22. 22.🏋️ Pushing a crate 10 m took 3000 J of work. What force was used, in newtons?
  23. 23.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Pushing a crate 8 m took 960 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 160 N did 960 J of work. How many metres did the object move?
  27. 27.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  29. 29.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 470 N did 4230 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 1 m took 180 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 10 N did 70 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 450 N pushes a cart 7 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 490 N did 1960 J of work. How many metres did the object move?
  35. 35.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 220 N did 1320 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 120 N pushes a cart 8 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 60 N pushes a cart 6 m along the floor. How much work is done, in joules?

Answer key

  1. 250
  2. 140
  3. 300
  4. less effort
  5. 40
  6. 120
  7. 4
  8. 4
  9. load ÷ effort
  10. 3
  11. 130
  12. joule (J)
  13. 240
  14. through a distance
  15. 3760
  16. 80
  17. 2
  18. 700
  19. 5
  20. 5
  21. 6
  22. 300
  23. 400
  24. 4
  25. 120
  26. 6
  27. 200
  28. no, work stays the same
  29. 4
  30. 9
  31. 180
  32. 7
  33. 3150
  34. 4
  35. 760
  36. 390
  37. 880
  38. 6
  39. 960
  40. 360

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