← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 328 · 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 pushes a cart 6 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Pushing a crate 8 m took 960 J of work. What force was used, in newtons?
  3. 3.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  4. 4.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 410 N pushes a cart 5 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
  11. 11.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 200 N pushes a cart 10 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  14. 14.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 10 N did 30 J of work. How many metres did the object move?
  17. 17.🏋️ Pushing a crate 7 m took 2800 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 80 N did 320 J of work. How many metres did the object move?
  19. 19.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 480 N did 960 J of work. How many metres did the object move?
  21. 21.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  22. 22.🏋️ A force of 310 N did 620 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 170 N did 510 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 4 m took 1360 J of work. What force was used, in newtons?
  27. 27.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  28. 28.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ Pushing a crate 1 m took 240 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A force of 230 N did 1840 J of work. How many metres did the object move?
  34. 34.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 290 N did 2610 J of work. How many metres did the object move?
  36. 36.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 3 m took 840 J of work. What force was used, in newtons?
  39. 39.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 390 N pushes a cart 1 m along the floor. How much work is done, in joules?

Answer key

  1. 1860
  2. 120
  3. less effort
  4. 4
  5. 750
  6. 2
  7. 850
  8. 3
  9. 2050
  10. load ÷ effort
  11. 2
  12. 2000
  13. no, work stays the same
  14. 550
  15. 950
  16. 3
  17. 400
  18. 4
  19. 3
  20. 2
  21. through a distance
  22. 2
  23. 2
  24. 6
  25. 3
  26. 340
  27. joule (J)
  28. 50
  29. 240
  30. 6
  31. 3
  32. 10
  33. 8
  34. 800
  35. 9
  36. 2
  37. 2
  38. 280
  39. 4
  40. 390

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