← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 84 · 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 longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  2. 2.🏋️ A force of 330 N pushes a cart 7 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 370 N pushes a cart 3 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 500 N did 500 J of work. How many metres did the object move?
  5. 5.🏋️ 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?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  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.🏋️ A force of 140 N did 140 J of work. How many metres did the object move?
  9. 9.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 7 m took 1120 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 2 m took 40 J of work. What force was used, in newtons?
  14. 14.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 130 N did 1170 J of work. How many metres did the object move?
  16. 16.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Pushing a crate 4 m took 1320 J of work. What force was used, in newtons?
  19. 19.🏋️ Pushing a crate 7 m took 1470 J of work. What force was used, in newtons?
  20. 20.🏋️ Pushing a crate 7 m took 2520 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 3 m took 1380 J of work. What force was used, in newtons?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  26. 26.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ Pushing a crate 9 m took 1620 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ Pushing a crate 3 m took 30 J of work. What force was used, in newtons?
  32. 32.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ Pushing a crate 6 m took 2640 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 10 N did 50 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 370 N did 740 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Pushing a crate 8 m took 3760 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?

Answer key

  1. less effort
  2. 2310
  3. 1110
  4. 1
  5. 420
  6. load ÷ effort
  7. through a distance
  8. 1
  9. 6
  10. 3
  11. 6
  12. 160
  13. 20
  14. 50
  15. 9
  16. 80
  17. 400
  18. 330
  19. 210
  20. 360
  21. 460
  22. 900
  23. 750
  24. 6
  25. no, work stays the same
  26. 650
  27. 2
  28. 100
  29. 180
  30. 700
  31. 10
  32. 50
  33. 100
  34. 500
  35. 440
  36. 5
  37. 2
  38. 2
  39. 470
  40. 6

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