← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 553 · 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.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  2. 2.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A force of 390 N did 3510 J of work. How many metres did the object move?
  4. 4.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  5. 5.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  7. 7.🏋️ A force of 180 N pushes a cart 5 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 4 m took 1680 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 410 N pushes a cart 2 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 180 N did 1260 J of work. How many metres did the object move?
  12. 12.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 190 N did 570 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 20 N pushes a cart 4 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 280 N pushes a cart 10 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 7 m took 420 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 320 N did 320 J of work. How many metres did the object move?
  20. 20.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 50 N pushes a cart 4 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 1 m took 270 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 4 m took 160 J of work. What force was used, in newtons?
  26. 26.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  27. 27.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 350 N pushes a cart 7 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 160 N did 160 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 170 N did 1360 J of work. How many metres did the object move?
  32. 32.🏋️ Pushing a crate 1 m took 150 J of work. What force was used, in newtons?
  33. 33.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 160 N pushes a cart 1 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 3 m took 750 J of work. What force was used, in newtons?
  36. 36.🏋️ A 12 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 430 N did 3870 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 3 m took 540 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 470 N pushes a cart 10 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 300 N did 2100 J of work. How many metres did the object move?

Answer key

  1. joule (J)
  2. 160
  3. 9
  4. load ÷ effort
  5. 240
  6. through a distance
  7. 900
  8. 2
  9. 420
  10. 820
  11. 7
  12. 200
  13. 3
  14. 80
  15. 450
  16. 2
  17. 2800
  18. 60
  19. 1
  20. 440
  21. 800
  22. 600
  23. 200
  24. 270
  25. 40
  26. no, work stays the same
  27. 2
  28. 2450
  29. 50
  30. 1
  31. 8
  32. 150
  33. 800
  34. 160
  35. 250
  36. 360
  37. 9
  38. 180
  39. 4700
  40. 7

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