← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 87 · 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.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
  2. 2.🏋️ A force of 70 N did 350 J of work. How many metres did the object move?
  3. 3.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  4. 4.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ Pushing a crate 8 m took 1120 J of work. What force was used, in newtons?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  7. 7.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A force of 320 N pushes a cart 6 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 70 N did 70 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 160 N pushes a cart 2 m along the floor. How much work is done, in joules?
  12. 12.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
  13. 13.🏋️ Pushing a crate 6 m took 1860 J of work. What force was used, in newtons?
  14. 14.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 430 N did 430 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 120 N pushes a cart 8 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  20. 20.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 260 N pushes a cart 4 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Pushing a crate 1 m took 130 J of work. What force was used, in newtons?
  24. 24.🏋️ Pushing a crate 7 m took 630 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 110 N did 220 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 7 m took 210 J of work. What force was used, in newtons?
  27. 27.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 210 N pushes a cart 3 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 170 N pushes a cart 9 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Pushing a crate 6 m took 1980 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 3 m took 360 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 1 m took 70 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 10 N did 90 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 180 N pushes a cart 7 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 70 N did 280 J of work. How many metres did the object move?
  40. 40.🏋️ Pushing a crate 10 m took 2700 J of work. What force was used, in newtons?

Answer key

  1. through a distance
  2. 5
  3. no, work stays the same
  4. 850
  5. 140
  6. load ÷ effort
  7. 2
  8. 40
  9. 1920
  10. 1
  11. 320
  12. joule (J)
  13. 310
  14. 150
  15. 160
  16. 320
  17. 1
  18. 960
  19. less effort
  20. 260
  21. 270
  22. 1040
  23. 130
  24. 90
  25. 2
  26. 30
  27. 150
  28. 600
  29. 630
  30. 1530
  31. 330
  32. 120
  33. 70
  34. 410
  35. 9
  36. 1260
  37. 5
  38. 750
  39. 4
  40. 270

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