← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 799 · 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.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ Pushing a crate 1 m took 190 J of work. What force was used, in newtons?
  3. 3.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 410 N pushes a cart 10 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 500 N did 1500 J of work. How many metres did the object move?
  7. 7.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  8. 8.🏋️ A force of 100 N pushes a cart 6 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  10. 10.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  11. 11.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 140 N did 980 J of work. How many metres did the object move?
  13. 13.🏋️ Pushing a crate 3 m took 630 J of work. What force was used, in newtons?
  14. 14.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  15. 15.🏋️ 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)
  16. 16.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  17. 17.🏋️ Pushing a crate 5 m took 2400 J of work. What force was used, in newtons?
  18. 18.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) yes, always (d) only on Mondays
  19. 19.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 1 m took 50 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 410 N pushes a cart 7 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 210 N pushes a cart 8 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 470 N did 2350 J of work. How many metres did the object move?
  29. 29.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 10 N did 70 J of work. How many metres did the object move?
  34. 34.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 300 N pushes a cart 3 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Pushing a crate 7 m took 840 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 5 m took 1800 J of work. What force was used, in newtons?
  39. 39.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 250 N did 1500 J of work. How many metres did the object move?

Answer key

  1. 180
  2. 190
  3. 5
  4. 4100
  5. 6
  6. 3
  7. through a distance
  8. 600
  9. load ÷ effort
  10. 90
  11. 450
  12. 7
  13. 210
  14. less effort
  15. 50
  16. joule (J)
  17. 480
  18. no, work stays the same
  19. 120
  20. 700
  21. 250
  22. 700
  23. 4
  24. 50
  25. 2870
  26. 150
  27. 1680
  28. 5
  29. 3
  30. 900
  31. 5
  32. 3
  33. 7
  34. 4
  35. 900
  36. 120
  37. 6
  38. 360
  39. 4
  40. 6

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