← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 472 · 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) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  2. 2.🏋️ Pushing a crate 8 m took 880 J of work. What force was used, in newtons?
  3. 3.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A force of 230 N pushes a cart 1 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Pushing a crate 7 m took 2660 J of work. What force was used, in newtons?
  7. 7.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  8. 8.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Pushing a crate 7 m took 2730 J of work. What force was used, in newtons?
  10. 10.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  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 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  16. 16.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  17. 17.🏋️ A force of 10 N did 30 J of work. How many metres did the object move?
  18. 18.🏋️ Pushing a crate 1 m took 100 J of work. What force was used, in newtons?
  19. 19.🏋️ Pushing a crate 8 m took 240 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?
  21. 21.🏋️ Pushing a crate 1 m took 140 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 160 N pushes a cart 6 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 250 N did 1750 J of work. How many metres did the object move?
  25. 25.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 450 N did 3150 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 390 N pushes a cart 6 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 2 m took 860 J of work. What force was used, in newtons?
  29. 29.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 140 N pushes a cart 4 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 270 N did 1350 J of work. How many metres did the object move?
  32. 32.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A force of 80 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ Pushing a crate 7 m took 2520 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 3 m took 1380 J of work. What force was used, in newtons?
  37. 37.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 290 N did 580 J of work. How many metres did the object move?
  39. 39.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?

Answer key

  1. joule (J)
  2. 110
  3. 60
  4. 2
  5. 230
  6. 380
  7. load ÷ effort
  8. 150
  9. 390
  10. 450
  11. 5
  12. through a distance
  13. 200
  14. 200
  15. no, work stays the same
  16. less effort
  17. 3
  18. 100
  19. 30
  20. 1
  21. 140
  22. 960
  23. 5
  24. 7
  25. 600
  26. 7
  27. 2340
  28. 430
  29. 350
  30. 560
  31. 5
  32. 180
  33. 80
  34. 2
  35. 360
  36. 460
  37. 900
  38. 2
  39. 1000
  40. 5

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