← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 538 · 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 machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ 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?
  3. 3.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 120 N did 120 J of work. How many metres did the object move?
  5. 5.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 6 m took 2760 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 490 N did 2940 J of work. How many metres did the object move?
  8. 8.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  9. 9.🏋️ Pushing a crate 5 m took 2350 J of work. What force was used, in newtons?
  10. 10.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
  11. 11.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  12. 12.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  15. 15.🏋️ A force of 350 N pushes a cart 9 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 470 N did 1410 J of work. How many metres did the object move?
  20. 20.🏋️ 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?
  21. 21.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 320 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 490 N did 4410 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 440 N pushes a cart 8 m along the floor. How much work is done, in joules?
  27. 27.🏋️ Pushing a crate 4 m took 320 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 10 N did 40 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 1 m took 130 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 430 N pushes a cart 6 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 500 N did 5000 J of work. How many metres did the object move?
  35. 35.🏋️ Pushing a crate 1 m took 330 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 230 N did 230 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 4 m took 1440 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 190 N did 760 J of work. How many metres did the object move?
  39. 39.🏋️ Pushing a crate 5 m took 550 J of work. What force was used, in newtons?
  40. 40.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 3
  2. 110
  3. 550
  4. 1
  5. 6
  6. 460
  7. 6
  8. no, work stays the same
  9. 470
  10. through a distance
  11. less effort
  12. 700
  13. 250
  14. joule (J)
  15. 3150
  16. 6
  17. 320
  18. 1000
  19. 3
  20. 570
  21. 3
  22. 960
  23. 6
  24. 400
  25. 9
  26. 3520
  27. 80
  28. 4
  29. 130
  30. 700
  31. 4
  32. 2580
  33. 200
  34. 10
  35. 330
  36. 1
  37. 360
  38. 4
  39. 110
  40. 200

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