← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 391 · 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.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  2. 2.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  4. 4.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ 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?
  6. 6.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 150 N did 1350 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 230 N pushes a cart 7 m along the floor. How much work is done, in joules?
  9. 9.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ 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)
  11. 11.🏋️ Pushing a crate 9 m took 2520 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 200 N pushes a cart 5 m along the floor. How much work is done, in joules?
  13. 13.🏋️ 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
  14. 14.🏋️ Pushing a crate 3 m took 1050 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 8 m took 400 J of work. What force was used, in newtons?
  16. 16.🏋️ 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)
  17. 17.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  18. 18.🏋️ A force of 20 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 7 m took 420 J of work. What force was used, in newtons?
  20. 20.🏋️ A 7 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 force of 50 N pushes a cart 4 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 20 N did 180 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 190 N pushes a cart 10 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 1 m took 490 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 8 m took 1600 J of work. What force was used, in newtons?
  27. 27.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 5 m took 1650 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 400 N did 4000 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 9 m took 1890 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 3 m took 330 J of work. What force was used, in newtons?
  33. 33.🏋️ A 5 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.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
  35. 35.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 150 N pushes a cart 7 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 330 N did 2310 J of work. How many metres did the object move?
  39. 39.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A force of 500 N pushes a cart 10 m along the floor. How much work is done, in joules?

Answer key

  1. joule (J)
  2. 450
  3. less effort
  4. 850
  5. 320
  6. 550
  7. 9
  8. 1610
  9. 360
  10. 50
  11. 280
  12. 1000
  13. no, work stays the same
  14. 350
  15. 50
  16. 750
  17. load ÷ effort
  18. 60
  19. 60
  20. 210
  21. 200
  22. 400
  23. 9
  24. 1900
  25. 490
  26. 200
  27. 800
  28. 330
  29. 10
  30. 2
  31. 210
  32. 110
  33. 100
  34. through a distance
  35. 50
  36. 1050
  37. 600
  38. 7
  39. 280
  40. 5000

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