← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 253 · 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 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  3. 3.🏋️ Pushing a crate 1 m took 30 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 390 N did 390 J of work. How many metres did the object move?
  5. 5.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 490 N pushes a cart 1 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 110 N did 770 J of work. How many metres did the object move?
  10. 10.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  11. 11.🏋️ A force of 380 N did 760 J of work. How many metres did the object move?
  12. 12.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  13. 13.🏋️ A force of 200 N did 1200 J of work. How many metres did the object move?
  14. 14.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  17. 17.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  19. 19.🏋️ A force of 170 N did 1190 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 360 N did 1440 J of work. How many metres did the object move?
  21. 21.🏋️ Pushing a crate 1 m took 190 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 310 N did 2790 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 70 N did 560 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 220 N did 880 J of work. How many metres did the object move?
  25. 25.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 230 N pushes a cart 8 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 140 N did 980 J of work. How many metres did the object move?
  29. 29.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 150 N pushes a cart 3 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 10 N pushes a cart 9 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 470 N pushes a cart 10 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 100 N pushes a cart 5 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Pushing a crate 4 m took 520 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?

Answer key

  1. 150
  2. less effort
  3. 30
  4. 1
  5. 4
  6. 400
  7. 3
  8. 490
  9. 7
  10. through a distance
  11. 2
  12. joule (J)
  13. 6
  14. 900
  15. 800
  16. load ÷ effort
  17. 600
  18. no, work stays the same
  19. 7
  20. 4
  21. 190
  22. 9
  23. 8
  24. 4
  25. 3
  26. 950
  27. 1840
  28. 7
  29. 5
  30. 450
  31. 20
  32. 90
  33. 440
  34. 4700
  35. 850
  36. 500
  37. 700
  38. 130
  39. 100
  40. 100

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