← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 487 · 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 340 N pushes a cart 8 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Pushing a crate 3 m took 990 J of work. What force was used, in newtons?
  3. 3.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  4. 4.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
  5. 5.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 190 N pushes a cart 7 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 290 N pushes a cart 10 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  11. 11.🏋️ A force of 290 N did 1160 J of work. How many metres did the object move?
  12. 12.🏋️ Pushing a crate 8 m took 1360 J of work. What force was used, in newtons?
  13. 13.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
  14. 14.🏋️ Pushing a crate 10 m took 2200 J of work. What force was used, in newtons?
  15. 15.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 430 N pushes a cart 9 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 210 N pushes a cart 8 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 340 N did 1700 J of work. How many metres did the object move?
  19. 19.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A force of 60 N pushes a cart 2 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 10 m took 3100 J of work. What force was used, in newtons?
  22. 22.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 330 N did 330 J of work. How many metres did the object move?
  25. 25.🏋️ Pushing a crate 2 m took 960 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 170 N did 170 J of work. How many metres did the object move?
  28. 28.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  29. 29.🏋️ Pushing a crate 1 m took 70 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 240 N pushes a cart 6 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Pushing a crate 10 m took 900 J of work. What force was used, in newtons?
  32. 32.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 120 N did 480 J of work. How many metres did the object move?
  35. 35.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Pushing a crate 9 m took 1800 J of work. What force was used, in newtons?
  37. 37.🏋️ 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?
  38. 38.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort

Answer key

  1. 2720
  2. 330
  3. joule (J)
  4. 120
  5. 320
  6. 2
  7. 2
  8. 1330
  9. 2900
  10. less effort
  11. 4
  12. 170
  13. through a distance
  14. 220
  15. 5
  16. 3870
  17. 1680
  18. 5
  19. 500
  20. 120
  21. 310
  22. 640
  23. 700
  24. 1
  25. 480
  26. 950
  27. 1
  28. no, work stays the same
  29. 70
  30. 1440
  31. 90
  32. 6
  33. 900
  34. 4
  35. 400
  36. 200
  37. 280
  38. 5
  39. 450
  40. load ÷ effort

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