← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 499 · 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 310 N did 930 J of work. How many metres did the object move?
  2. 2.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
  3. 3.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  4. 4.🏋️ A force of 350 N pushes a cart 8 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 50 N pushes a cart 9 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 7 m took 1470 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 340 N pushes a cart 3 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 30 N did 30 J of work. How many metres did the object move?
  10. 10.🏋️ Pushing a crate 6 m took 2160 J of work. What force was used, in newtons?
  11. 11.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
  12. 12.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  15. 15.🏋️ Pushing a crate 2 m took 780 J of work. What force was used, in newtons?
  16. 16.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  17. 17.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3900 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 280 N did 280 J of work. How many metres did the object move?
  20. 20.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Pushing a crate 7 m took 1400 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 4 m took 1440 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 490 N did 3920 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 3 m took 840 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  26. 26.🏋️ 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)
  27. 27.🏋️ A force of 70 N did 70 J of work. How many metres did the object move?
  28. 28.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 220 N did 660 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 8 m took 80 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 2 m took 420 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 6 m took 2940 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 320 N pushes a cart 6 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ Pushing a crate 4 m took 1960 J of work. What force was used, in newtons?

Answer key

  1. 3
  2. joule (J)
  3. load ÷ effort
  4. 2800
  5. 3
  6. 450
  7. 210
  8. 1020
  9. 1
  10. 360
  11. no, work stays the same
  12. 420
  13. 150
  14. less effort
  15. 390
  16. through a distance
  17. 650
  18. 200
  19. 1
  20. 100
  21. 200
  22. 360
  23. 8
  24. 280
  25. 60
  26. 750
  27. 1
  28. 900
  29. 3
  30. 10
  31. 2
  32. 210
  33. 490
  34. 350
  35. 1920
  36. 50
  37. 3
  38. 900
  39. 5
  40. 490

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