← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 318 · 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 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  4. 4.🏋️ A force of 100 N did 700 J of work. How many metres did the object move?
  5. 5.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  6. 6.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 7 m took 140 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 250 N pushes a cart 2 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Pushing a crate 9 m took 720 J of work. What force was used, in newtons?
  12. 12.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A force of 100 N pushes a cart 5 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 9 m took 4410 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 4 m took 1520 J of work. What force was used, in newtons?
  16. 16.🏋️ Pushing a crate 2 m took 540 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 380 N did 1140 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 30 N did 150 J of work. How many metres did the object move?
  19. 19.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  20. 20.🏋️ A force of 340 N did 2380 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?
  22. 22.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  23. 23.🏋️ Pushing a crate 8 m took 2480 J of work. What force was used, in newtons?
  24. 24.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  25. 25.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 270 N did 540 J of work. How many metres did the object move?
  27. 27.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Pushing a crate 9 m took 4500 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 240 N did 960 J of work. How many metres did the object move?
  30. 30.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 200 N did 600 J of work. How many metres did the object move?
  32. 32.🏋️ Pushing a crate 10 m took 1400 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 1 m took 380 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 7 m took 3500 J of work. What force was used, in newtons?
  35. 35.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  36. 36.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 420 N pushes a cart 9 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ Pushing a crate 4 m took 1360 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 350 N did 2450 J of work. How many metres did the object move?

Answer key

  1. 650
  2. 2
  3. joule (J)
  4. 7
  5. 90
  6. 600
  7. 5
  8. 4
  9. 20
  10. 500
  11. 80
  12. 20
  13. 500
  14. 490
  15. 380
  16. 270
  17. 3
  18. 5
  19. less effort
  20. 7
  21. 1
  22. load ÷ effort
  23. 310
  24. no, work stays the same
  25. 3
  26. 2
  27. 2
  28. 500
  29. 4
  30. 100
  31. 3
  32. 140
  33. 380
  34. 500
  35. through a distance
  36. 6
  37. 3780
  38. 150
  39. 340
  40. 7

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