← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 953 · 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 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)
  2. 2.🏋️ A force of 310 N did 2480 J of work. How many metres did the object move?
  3. 3.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  4. 4.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  6. 6.🏋️ Pushing a crate 8 m took 240 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 470 N did 1880 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 330 N did 1980 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 370 N pushes a cart 6 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 230 N did 920 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 290 N pushes a cart 10 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ 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?
  14. 14.🏋️ A force of 460 N pushes a cart 2 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  16. 16.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 140 N pushes a cart 4 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 350 N pushes a cart 5 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
  21. 21.🏋️ Pushing a crate 7 m took 2450 J of work. What force was used, in newtons?
  22. 22.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  23. 23.🏋️ A force of 370 N pushes a cart 4 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 10 m took 2600 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 290 N did 2030 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 2 m took 20 J of work. What force was used, in newtons?
  27. 27.🏋️ 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?
  28. 28.🏋️ 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?
  29. 29.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 400 N did 2400 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 230 N did 690 J of work. How many metres did the object move?
  32. 32.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 40 N pushes a cart 2 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 120 N pushes a cart 5 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 290 N pushes a cart 7 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 420 N pushes a cart 10 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 460 N did 3220 J of work. How many metres did the object move?
  39. 39.🏋️ Pushing a crate 8 m took 2880 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 10 N pushes a cart 4 m along the floor. How much work is done, in joules?

Answer key

  1. 400
  2. 8
  3. no, work stays the same
  4. 50
  5. through a distance
  6. 30
  7. 4
  8. 6
  9. 2220
  10. 4
  11. 2900
  12. 500
  13. 20
  14. 920
  15. load ÷ effort
  16. 4
  17. 560
  18. 1750
  19. 5
  20. joule (J)
  21. 350
  22. less effort
  23. 1480
  24. 260
  25. 7
  26. 10
  27. 360
  28. 100
  29. 5
  30. 6
  31. 3
  32. 3
  33. 80
  34. 600
  35. 140
  36. 2030
  37. 4200
  38. 7
  39. 360
  40. 40

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