← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 750 · 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 smooth ramp is 12 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
  5. 5.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  6. 6.🏋️ A force of 360 N pushes a cart 4 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 500 N did 3500 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 470 N pushes a cart 7 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 60 N did 540 J of work. How many metres did the object move?
  13. 13.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  15. 15.🏋️ 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?
  16. 16.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 410 N pushes a cart 9 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ 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
  21. 21.🏋️ A force of 220 N did 220 J of work. How many metres did the object move?
  22. 22.🏋️ Pushing a crate 3 m took 690 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  26. 26.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 230 N pushes a cart 10 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 4 m took 440 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ Pushing a crate 3 m took 1320 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 20 N did 140 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 370 N pushes a cart 7 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ 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?
  36. 36.🏋️ A force of 10 N did 80 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 210 N did 1470 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 100 N pushes a cart 3 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?

Answer key

  1. 750
  2. 1380
  3. 6
  4. less effort
  5. through a distance
  6. 1440
  7. 7
  8. 3290
  9. 100
  10. 2
  11. 5
  12. 9
  13. 4
  14. joule (J)
  15. 200
  16. 6
  17. 3690
  18. 3
  19. 2
  20. no, work stays the same
  21. 1
  22. 230
  23. 5
  24. 950
  25. load ÷ effort
  26. 6
  27. 2300
  28. 110
  29. 2
  30. 440
  31. 7
  32. 2590
  33. 400
  34. 650
  35. 450
  36. 8
  37. 7
  38. 4
  39. 300
  40. 5

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