← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 833 · 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.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  2. 2.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  3. 3.🏋️ Pushing a crate 1 m took 200 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 100 N did 1000 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 210 N did 840 J of work. How many metres did the object move?
  6. 6.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  8. 8.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ 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?
  11. 11.🏋️ A force of 380 N did 2660 J of work. How many metres did the object move?
  12. 12.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A 6 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 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A force of 350 N did 700 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 100 N did 400 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 130 N pushes a cart 10 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 8 m took 1280 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 390 N pushes a cart 2 m along the floor. How much work is done, in joules?
  20. 20.🏋️ 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?
  21. 21.🏋️ A force of 330 N pushes a cart 6 m along the floor. How much work is done, in joules?
  22. 22.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  23. 23.🏋️ A force of 70 N did 70 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 10 m took 4600 J of work. What force was used, in newtons?
  25. 25.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ 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)
  27. 27.🏋️ A force of 470 N pushes a cart 2 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ Pushing a crate 3 m took 330 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 330 N did 990 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 310 N did 1860 J of work. How many metres did the object move?
  33. 33.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ Pushing a crate 1 m took 380 J of work. What force was used, in newtons?
  36. 36.🏋️ 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)
  37. 37.🏋️ A force of 330 N did 2640 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 30 N pushes a cart 10 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 70 N did 700 J of work. How many metres did the object move?

Answer key

  1. through a distance
  2. load ÷ effort
  3. 200
  4. 10
  5. 4
  6. 3
  7. no, work stays the same
  8. 3
  9. 2
  10. 360
  11. 7
  12. 570
  13. 120
  14. 280
  15. 2
  16. 4
  17. 1300
  18. 160
  19. 780
  20. 100
  21. 1980
  22. joule (J)
  23. 1
  24. 460
  25. 150
  26. 350
  27. 940
  28. 240
  29. 350
  30. 110
  31. 3
  32. 6
  33. 850
  34. 600
  35. 380
  36. 900
  37. 8
  38. 4
  39. 300
  40. 10

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