← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 344 · 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.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  2. 2.🏋️ 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?
  3. 3.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 120 N did 1200 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 410 N did 410 J of work. How many metres did the object move?
  6. 6.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
  7. 7.🏋️ A force of 440 N did 2200 J of work. How many metres did the object move?
  8. 8.🏋️ A 16 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 machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  11. 11.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 60 N pushes a cart 3 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Pushing a crate 7 m took 1400 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 200 N pushes a cart 5 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A 19 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 force of 250 N did 2500 J of work. How many metres did the object move?
  17. 17.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  19. 19.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  20. 20.🏋️ A force of 460 N did 3220 J of work. How many metres did the object move?
  21. 21.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 470 N did 470 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 410 N pushes a cart 5 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 120 N pushes a cart 4 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 420 N pushes a cart 4 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 100 N pushes a cart 9 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 200 N did 400 J of work. How many metres did the object move?
  34. 34.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 300 N did 1200 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 70 N did 490 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 220 N pushes a cart 5 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ Pushing a crate 2 m took 620 J of work. What force was used, in newtons?
  40. 40.🏋️ 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?

Answer key

  1. joule (J)
  2. 120
  3. 900
  4. 10
  5. 1
  6. no, work stays the same
  7. 5
  8. 640
  9. 6
  10. load ÷ effort
  11. 4
  12. 180
  13. 200
  14. 1000
  15. 190
  16. 10
  17. 4
  18. through a distance
  19. less effort
  20. 7
  21. 40
  22. 1
  23. 6
  24. 2050
  25. 50
  26. 2
  27. 480
  28. 3
  29. 1680
  30. 900
  31. 650
  32. 2
  33. 2
  34. 4
  35. 4
  36. 7
  37. 1100
  38. 380
  39. 310
  40. 260

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