← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 781 · 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 480 N pushes a cart 2 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A 7 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 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.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  7. 7.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
  8. 8.🏋️ A force of 240 N did 480 J of work. How many metres did the object move?
  9. 9.🏋️ Pushing a crate 5 m took 2000 J of work. What force was used, in newtons?
  10. 10.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 180 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  14. 14.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ Pushing a crate 6 m took 600 J of work. What force was used, in newtons?
  16. 16.🏋️ Pushing a crate 2 m took 500 J of work. What force was used, in newtons?
  17. 17.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  18. 18.🏋️ Pushing a crate 2 m took 80 J of work. What force was used, in newtons?
  19. 19.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  20. 20.🏋️ A force of 40 N did 80 J of work. How many metres did the object move?
  21. 21.🏋️ Pushing a crate 9 m took 990 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 350 N pushes a cart 9 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 450 N did 1350 J of work. How many metres did the object move?
  24. 24.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  25. 25.🏋️ A force of 240 N pushes a cart 10 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 30 N pushes a cart 1 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 1 m took 400 J of work. What force was used, in newtons?
  34. 34.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 210 N pushes a cart 9 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ Pushing a crate 9 m took 3690 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 4 m took 440 J of work. What force was used, in newtons?

Answer key

  1. 960
  2. 400
  3. 950
  4. 140
  5. 150
  6. 90
  7. less effort
  8. 2
  9. 400
  10. 6
  11. 180
  12. 3
  13. load ÷ effort
  14. 330
  15. 100
  16. 250
  17. joule (J)
  18. 40
  19. through a distance
  20. 2
  21. 110
  22. 3150
  23. 3
  24. no, work stays the same
  25. 2400
  26. 100
  27. 950
  28. 700
  29. 180
  30. 6
  31. 30
  32. 5
  33. 400
  34. 5
  35. 1890
  36. 1000
  37. 5
  38. 240
  39. 410
  40. 110

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