← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 348 · 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) only upwards (b) very slowly (c) without moving it (d) through a distance
  2. 2.🏋️ A force of 140 N did 980 J of work. How many metres did the object move?
  3. 3.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  5. 5.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 480 N did 960 J of work. How many metres did the object move?
  8. 8.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Pushing a crate 9 m took 3330 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 320 N pushes a cart 8 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A force of 90 N pushes a cart 5 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  15. 15.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 400 N pushes a cart 7 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 1 m took 250 J of work. What force was used, in newtons?
  23. 23.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 70 N pushes a cart 9 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 90 N did 360 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 10 N did 20 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 480 N did 2880 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 500 N did 3500 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 440 N did 440 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 100 N pushes a cart 9 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 70 N pushes a cart 4 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 5 m took 2300 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  40. 40.🏋️ A force of 260 N pushes a cart 4 m along the floor. How much work is done, in joules?

Answer key

  1. through a distance
  2. 7
  3. 180
  4. joule (J)
  5. 110
  6. 5
  7. 2
  8. 600
  9. 370
  10. 2560
  11. 90
  12. 450
  13. 5
  14. no, work stays the same
  15. 350
  16. 6
  17. 6
  18. 550
  19. 150
  20. 5
  21. 2800
  22. 250
  23. 50
  24. 5
  25. 630
  26. 4
  27. 2
  28. 6
  29. 7
  30. 5
  31. 1
  32. 900
  33. 40
  34. 100
  35. 5
  36. 280
  37. 460
  38. 3
  39. load ÷ effort
  40. 1040

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