← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 567 · 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 machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 350 N pushes a cart 1 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 140 N did 420 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 400 N did 400 J of work. How many metres did the object move?
  5. 5.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ Pushing a crate 7 m took 2870 J of work. What force was used, in newtons?
  8. 8.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ 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?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  11. 11.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
  12. 12.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  13. 13.🏋️ A force of 270 N did 2700 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 100 N pushes a cart 9 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 130 N did 520 J of work. How many metres did the object move?
  20. 20.🏋️ 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?
  21. 21.🏋️ A force of 140 N did 140 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 60 N did 300 J of work. How many metres did the object move?
  23. 23.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  24. 24.🏋️ A force of 480 N did 960 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 470 N pushes a cart 8 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 6 m took 1860 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 200 N pushes a cart 9 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 160 N did 1120 J of work. How many metres did the object move?
  29. 29.🏋️ 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?
  30. 30.🏋️ Pushing a crate 8 m took 3040 J of work. What force was used, in newtons?
  31. 31.🏋️ 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?
  32. 32.🏋️ Pushing a crate 6 m took 480 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 1 m took 60 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 90 N pushes a cart 1 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 330 N pushes a cart 5 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 140 N pushes a cart 10 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A force of 320 N pushes a cart 8 m along the floor. How much work is done, in joules?

Answer key

  1. 4
  2. 350
  3. 3
  4. 1
  5. 600
  6. 300
  7. 410
  8. 4
  9. 260
  10. load ÷ effort
  11. less effort
  12. through a distance
  13. 10
  14. 900
  15. 100
  16. 3
  17. 450
  18. 150
  19. 4
  20. 280
  21. 1
  22. 5
  23. no, work stays the same
  24. 2
  25. 3760
  26. 310
  27. 1800
  28. 7
  29. 190
  30. 380
  31. 120
  32. 80
  33. 60
  34. 90
  35. 5
  36. 2
  37. 1650
  38. 1400
  39. 450
  40. 2560

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