← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 251 · 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.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  3. 3.🏋️ Pushing a crate 10 m took 500 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 170 N did 340 J of work. How many metres did the object move?
  5. 5.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
  7. 7.🏋️ A force of 140 N did 980 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 110 N pushes a cart 4 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 2 m took 380 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 220 N pushes a cart 7 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 80 N did 320 J of work. How many metres did the object move?
  12. 12.🏋️ Pushing a crate 2 m took 120 J of work. What force was used, in newtons?
  13. 13.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Pushing a crate 6 m took 2340 J of work. What force was used, in newtons?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 490 N did 2940 J of work. How many metres did the object move?
  18. 18.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ Pushing a crate 2 m took 980 J of work. What force was used, in newtons?
  20. 20.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 180 N did 1620 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 340 N pushes a cart 2 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 400 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 10 N pushes a cart 9 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  26. 26.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 420 N pushes a cart 4 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 9 m took 540 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 3 m took 510 J of work. What force was used, in newtons?
  32. 32.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 9 m took 3330 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 6 m took 840 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 7 m took 1820 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 7 m took 2240 J of work. What force was used, in newtons?
  39. 39.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ Pushing a crate 2 m took 560 J of work. What force was used, in newtons?

Answer key

  1. load ÷ effort
  2. no, work stays the same
  3. 50
  4. 2
  5. 150
  6. joule (J)
  7. 7
  8. 440
  9. 190
  10. 1540
  11. 4
  12. 60
  13. 5
  14. 390
  15. 100
  16. 480
  17. 6
  18. 40
  19. 490
  20. 550
  21. 9
  22. 680
  23. 800
  24. 90
  25. through a distance
  26. 150
  27. 1680
  28. 600
  29. 60
  30. 5
  31. 170
  32. 200
  33. 370
  34. 140
  35. 4
  36. 260
  37. 4
  38. 320
  39. 4
  40. 280

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