← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 178 · 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.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  2. 2.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  3. 3.🏋️ A force of 250 N pushes a cart 1 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A 5 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.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  7. 7.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A force of 390 N pushes a cart 4 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Pushing a crate 4 m took 1440 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 120 N pushes a cart 7 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 130 N pushes a cart 7 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 330 N did 990 J of work. How many metres did the object move?
  19. 19.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 140 N pushes a cart 1 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 400 N did 2000 J of work. How many metres did the object move?
  23. 23.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ Pushing a crate 1 m took 100 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 150 N did 1200 J of work. How many metres did the object move?
  26. 26.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ Pushing a crate 6 m took 900 J of work. What force was used, in newtons?
  28. 28.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ Pushing a crate 3 m took 120 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 500 N did 2000 J of work. How many metres did the object move?
  32. 32.🏋️ Pushing a crate 7 m took 2240 J of work. What force was used, in newtons?
  33. 33.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 400 N did 800 J of work. How many metres did the object move?
  36. 36.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 3 m took 1140 J of work. What force was used, in newtons?
  38. 38.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  39. 39.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  40. 40.🏋️ A force of 430 N pushes a cart 4 m along the floor. How much work is done, in joules?

Answer key

  1. joule (J)
  2. less effort
  3. 250
  4. 240
  5. 200
  6. no, work stays the same
  7. 60
  8. 1560
  9. 390
  10. 4
  11. 100
  12. 360
  13. 840
  14. 300
  15. 600
  16. 910
  17. 100
  18. 3
  19. 2
  20. 100
  21. 140
  22. 5
  23. 190
  24. 100
  25. 8
  26. 200
  27. 150
  28. 700
  29. 80
  30. 40
  31. 4
  32. 320
  33. 3
  34. 1260
  35. 2
  36. 5
  37. 380
  38. load ÷ effort
  39. through a distance
  40. 1720

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