← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 816 · 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 machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 70 N pushes a cart 8 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  6. 6.🏋️ A force of 210 N did 1050 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 190 N did 1140 J of work. How many metres did the object move?
  8. 8.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
  9. 9.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ 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)
  11. 11.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ Pushing a crate 7 m took 1330 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 300 N did 600 J of work. How many metres did the object move?
  15. 15.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
  16. 16.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  17. 17.🏋️ A force of 130 N did 1040 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 110 N did 220 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 9 m took 4410 J of work. What force was used, in newtons?
  20. 20.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  23. 23.🏋️ Pushing a crate 6 m took 660 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 170 N pushes a cart 7 m along the floor. How much work is done, in joules?
  25. 25.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 390 N did 390 J of work. How many metres did the object move?
  27. 27.🏋️ Pushing a crate 4 m took 80 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 8 m took 880 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 380 N did 380 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 2 m took 940 J of work. What force was used, in newtons?
  31. 31.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 440 N pushes a cart 10 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 200 N did 1200 J of work. How many metres did the object move?
  34. 34.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 10 m took 2100 J of work. What force was used, in newtons?
  37. 37.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 120 N pushes a cart 3 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 340 N did 3060 J of work. How many metres did the object move?

Answer key

  1. 3
  2. 560
  3. 450
  4. 3
  5. no, work stays the same
  6. 5
  7. 6
  8. less effort
  9. 3
  10. 250
  11. 700
  12. 3
  13. 190
  14. 2
  15. joule (J)
  16. through a distance
  17. 8
  18. 2
  19. 490
  20. 100
  21. 800
  22. load ÷ effort
  23. 110
  24. 1190
  25. 220
  26. 1
  27. 20
  28. 110
  29. 1
  30. 470
  31. 20
  32. 4400
  33. 6
  34. 350
  35. 6
  36. 210
  37. 320
  38. 360
  39. 600
  40. 9

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