← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 789 · 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 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A force of 210 N pushes a cart 8 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
  4. 4.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  5. 5.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  6. 6.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 190 N pushes a cart 7 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 7 m took 140 J of work. What force was used, in newtons?
  9. 9.🏋️ Pushing a crate 2 m took 300 J of work. What force was used, in newtons?
  10. 10.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  14. 14.🏋️ A force of 10 N did 40 J of work. How many metres did the object move?
  15. 15.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 380 N did 1900 J of work. How many metres did the object move?
  17. 17.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ 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)
  19. 19.🏋️ Pushing a crate 4 m took 1400 J of work. What force was used, in newtons?
  20. 20.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 410 N did 820 J of work. How many metres did the object move?
  22. 22.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  23. 23.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 220 N did 1100 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 150 N pushes a cart 3 m along the floor. How much work is done, in joules?
  26. 26.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 400 N did 3200 J of work. How many metres did the object move?
  29. 29.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ 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)
  33. 33.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 500 N did 3000 J of work. How many metres did the object move?
  35. 35.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?

Answer key

  1. 260
  2. 1680
  3. less effort
  4. joule (J)
  5. through a distance
  6. 500
  7. 1330
  8. 20
  9. 150
  10. 5
  11. 6
  12. 4
  13. load ÷ effort
  14. 4
  15. 950
  16. 5
  17. 150
  18. 50
  19. 350
  20. 200
  21. 2
  22. no, work stays the same
  23. 250
  24. 5
  25. 450
  26. 320
  27. 4
  28. 8
  29. 550
  30. 270
  31. 50
  32. 350
  33. 6
  34. 6
  35. 3
  36. 650
  37. 4
  38. 2
  39. 80
  40. 4

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