← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 436 · 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 force of 250 N did 2250 J of work. How many metres did the object move?
  2. 2.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  3. 3.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  6. 6.🏋️ A force of 300 N did 600 J of work. How many metres did the object move?
  7. 7.🏋️ Pushing a crate 7 m took 210 J of work. What force was used, in newtons?
  8. 8.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  10. 10.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 220 N did 1980 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 360 N did 2520 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 100 N pushes a cart 6 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
  16. 16.🏋️ A force of 270 N pushes a cart 7 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 320 N did 960 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 480 N did 4320 J of work. How many metres did the object move?
  19. 19.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 190 N pushes a cart 7 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 70 N did 490 J of work. How many metres did the object move?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ Pushing a crate 9 m took 1980 J of work. What force was used, in newtons?
  24. 24.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Pushing a crate 6 m took 1200 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 5 m took 450 J of work. What force was used, in newtons?
  28. 28.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A force of 180 N did 1800 J of work. How many metres did the object move?
  30. 30.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 220 N pushes a cart 9 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 330 N did 330 J of work. How many metres did the object move?
  34. 34.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 250 N pushes a cart 1 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 1 m took 70 J of work. What force was used, in newtons?
  38. 38.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 340 N pushes a cart 5 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 9
  2. joule (J)
  3. 2
  4. 20
  5. no, work stays the same
  6. 2
  7. 30
  8. 250
  9. load ÷ effort
  10. 3
  11. 4
  12. 9
  13. 7
  14. 600
  15. less effort
  16. 1890
  17. 3
  18. 9
  19. 150
  20. 1330
  21. 7
  22. 50
  23. 220
  24. 650
  25. 220
  26. 200
  27. 90
  28. 420
  29. 10
  30. 900
  31. 1980
  32. 3
  33. 1
  34. 750
  35. 130
  36. 250
  37. 70
  38. 500
  39. 1700
  40. 350

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