← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 745 · 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 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  3. 3.🏋️ A force of 420 N pushes a cart 2 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 490 N did 490 J of work. How many metres did the object move?
  7. 7.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A force of 450 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 270 N pushes a cart 5 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  12. 12.🏋️ 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?
  13. 13.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  15. 15.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  16. 16.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 370 N pushes a cart 8 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 50 N did 200 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 230 N did 230 J of work. How many metres did the object move?
  20. 20.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  21. 21.🏋️ A force of 380 N did 2660 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 10 N pushes a cart 10 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 120 N pushes a cart 3 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 80 N did 240 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 460 N did 4140 J of work. How many metres did the object move?
  27. 27.🏋️ Pushing a crate 10 m took 1700 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 5 m took 450 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 290 N pushes a cart 6 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 20 N did 60 J of work. How many metres did the object move?
  33. 33.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ 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?
  36. 36.🏋️ A force of 500 N did 4500 J of work. How many metres did the object move?
  37. 37.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 4 m took 1800 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 260 N pushes a cart 4 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?

Answer key

  1. 350
  2. through a distance
  3. 840
  4. 4
  5. 500
  6. 1
  7. 200
  8. 3600
  9. 850
  10. 1350
  11. less effort
  12. 390
  13. 500
  14. load ÷ effort
  15. no, work stays the same
  16. 50
  17. 2960
  18. 4
  19. 1
  20. joule (J)
  21. 7
  22. 100
  23. 360
  24. 600
  25. 3
  26. 9
  27. 170
  28. 90
  29. 1740
  30. 120
  31. 6
  32. 3
  33. 6
  34. 400
  35. 330
  36. 9
  37. 2
  38. 450
  39. 1040
  40. 4

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