← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 590 · 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.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  2. 2.🏋️ A force of 230 N did 690 J of work. How many metres did the object move?
  3. 3.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  4. 4.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ Pushing a crate 5 m took 1500 J of work. What force was used, in newtons?
  6. 6.🏋️ 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?
  7. 7.🏋️ A force of 70 N pushes a cart 1 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Pushing a crate 7 m took 910 J of work. What force was used, in newtons?
  10. 10.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 470 N pushes a cart 3 m along the floor. How much work is done, in joules?
  12. 12.🏋️ 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?
  13. 13.🏋️ 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?
  14. 14.🏋️ Pushing a crate 8 m took 2480 J of work. What force was used, in newtons?
  15. 15.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  16. 16.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
  17. 17.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Pushing a crate 2 m took 380 J of work. What force was used, in newtons?
  20. 20.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 360 N pushes a cart 8 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 450 N pushes a cart 7 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 5 m took 2450 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 10 m took 3000 J of work. What force was used, in newtons?
  28. 28.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 200 N did 600 J of work. How many metres did the object move?
  30. 30.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  32. 32.🏋️ 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?
  33. 33.🏋️ A force of 40 N did 240 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 1 m took 70 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 30 N pushes a cart 3 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ Pushing a crate 10 m took 1700 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 400 N pushes a cart 2 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. load ÷ effort
  2. 3
  3. less effort
  4. 50
  5. 300
  6. 390
  7. 70
  8. 100
  9. 130
  10. 4
  11. 1410
  12. 300
  13. 160
  14. 310
  15. no, work stays the same
  16. through a distance
  17. 650
  18. 400
  19. 190
  20. 600
  21. 2880
  22. 390
  23. 30
  24. 400
  25. 3150
  26. 490
  27. 300
  28. 150
  29. 3
  30. 800
  31. joule (J)
  32. 40
  33. 6
  34. 70
  35. 90
  36. 280
  37. 170
  38. 800
  39. 900
  40. 900

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