← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 684 · 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.🏋️ Pushing a crate 5 m took 750 J of work. What force was used, in newtons?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  3. 3.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  4. 4.🏋️ 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?
  5. 5.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ 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?
  7. 7.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  8. 8.🏋️ A force of 440 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 290 N pushes a cart 6 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 400 N pushes a cart 5 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 90 N did 270 J of work. How many metres did the object move?
  14. 14.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  15. 15.🏋️ 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?
  16. 16.🏋️ Pushing a crate 1 m took 10 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 9 m took 4410 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 410 N did 410 J of work. How many metres did the object move?
  19. 19.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 360 N did 1800 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 110 N did 220 J of work. How many metres did the object move?
  22. 22.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ 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?
  25. 25.🏋️ Pushing a crate 5 m took 600 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 100 N pushes a cart 6 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 310 N did 1550 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 130 N did 390 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 260 N did 1300 J of work. How many metres did the object move?
  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 force of 250 N pushes a cart 9 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 9 m took 3150 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 490 N did 980 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 6 m took 1140 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 210 N pushes a cart 1 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 280 N pushes a cart 1 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 5 m took 1700 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 90 N did 450 J of work. How many metres did the object move?
  39. 39.🏋️ 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?
  40. 40.🏋️ Pushing a crate 7 m took 700 J of work. What force was used, in newtons?

Answer key

  1. 150
  2. no, work stays the same
  3. load ÷ effort
  4. 50
  5. 400
  6. 570
  7. joule (J)
  8. 3520
  9. 950
  10. 6
  11. 1740
  12. 2000
  13. 3
  14. less effort
  15. 640
  16. 10
  17. 490
  18. 1
  19. 900
  20. 5
  21. 2
  22. 5
  23. 6
  24. 200
  25. 120
  26. 600
  27. 5
  28. 3
  29. 5
  30. 900
  31. 2250
  32. 350
  33. 2
  34. 190
  35. 210
  36. 280
  37. 340
  38. 5
  39. 100
  40. 100

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