← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 867 · 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 force of 280 N did 2520 J of work. How many metres did the object move?
  2. 2.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?
  3. 3.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 40 N pushes a cart 1 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 9 m took 4410 J of work. What force was used, in newtons?
  7. 7.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  8. 8.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  9. 9.🏋️ A force of 120 N pushes a cart 7 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Pushing a crate 2 m took 720 J of work. What force was used, in newtons?
  12. 12.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  14. 14.🏋️ A force of 140 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  16. 16.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  17. 17.🏋️ Pushing a crate 6 m took 600 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 140 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Pushing a crate 8 m took 720 J of work. What force was used, in newtons?
  21. 21.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 30 N pushes a cart 4 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ Pushing a crate 1 m took 80 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 40 N did 40 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 180 N did 1620 J of work. How many metres did the object move?
  29. 29.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 450 N pushes a cart 10 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 8 m took 4000 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 230 N did 460 J of work. How many metres did the object move?
  35. 35.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 250 N pushes a cart 4 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 50 N pushes a cart 9 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 3 m took 240 J of work. What force was used, in newtons?

Answer key

  1. 9
  2. 100
  3. 760
  4. 40
  5. 3
  6. 490
  7. through a distance
  8. joule (J)
  9. 840
  10. 3
  11. 360
  12. 50
  13. less effort
  14. 420
  15. load ÷ effort
  16. no, work stays the same
  17. 100
  18. 280
  19. 4
  20. 90
  21. 50
  22. 150
  23. 120
  24. 150
  25. 100
  26. 80
  27. 1
  28. 9
  29. 400
  30. 4500
  31. 2
  32. 500
  33. 880
  34. 2
  35. 750
  36. 650
  37. 900
  38. 1000
  39. 450
  40. 80

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