← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 617 · 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 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?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  3. 3.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ Pushing a crate 2 m took 540 J of work. What force was used, in newtons?
  6. 6.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ Pushing a crate 1 m took 140 J of work. What force was used, in newtons?
  10. 10.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  13. 13.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  14. 14.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
  15. 15.🏋️ Pushing a crate 1 m took 280 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 30 N did 60 J of work. How many metres did the object move?
  17. 17.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 40 N did 320 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 5 m took 600 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 90 N pushes a cart 6 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  22. 22.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 170 N did 510 J of work. How many metres did the object move?
  24. 24.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 320 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 280 N did 840 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 1 m took 200 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 230 N pushes a cart 8 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 130 N did 650 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 70 N did 560 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 7 m took 2800 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 230 N did 920 J of work. How many metres did the object move?
  39. 39.🏋️ Pushing a crate 3 m took 1500 J of work. What force was used, in newtons?
  40. 40.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 360
  2. no, work stays the same
  3. 850
  4. 420
  5. 270
  6. 5
  7. 3
  8. 110
  9. 140
  10. 3
  11. 600
  12. 100
  13. joule (J)
  14. through a distance
  15. 280
  16. 2
  17. 200
  18. 8
  19. 120
  20. 540
  21. less effort
  22. 300
  23. 3
  24. 120
  25. 50
  26. 960
  27. 80
  28. 210
  29. 3
  30. 200
  31. 1840
  32. 5
  33. 60
  34. 350
  35. 3
  36. 8
  37. 400
  38. 4
  39. 500
  40. 100

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