← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 138 · 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 smooth ramp is 4 m long and rises 2 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ 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
  5. 5.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 160 N pushes a cart 2 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 8 m took 400 J of work. What force was used, in newtons?
  8. 8.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A force of 340 N pushes a cart 1 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A force of 470 N did 2350 J of work. How many metres did the object move?
  13. 13.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  14. 14.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  15. 15.🏋️ Pushing a crate 3 m took 1380 J of work. What force was used, in newtons?
  16. 16.🏋️ Pushing a crate 10 m took 1500 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 8 m took 3040 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 5 m took 1950 J of work. What force was used, in newtons?
  19. 19.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  20. 20.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 250 N pushes a cart 2 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 90 N pushes a cart 3 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 30 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 20 N pushes a cart 5 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A 16 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.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) effort ÷ load (d) load × effort
  30. 30.🏋️ A force of 270 N did 810 J of work. How many metres did the object move?
  31. 31.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 370 N pushes a cart 8 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 170 N pushes a cart 4 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 290 N did 1160 J of work. How many metres did the object move?
  37. 37.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 80 N did 240 J of work. How many metres did the object move?

Answer key

  1. 550
  2. 2
  3. 450
  4. no, work stays the same
  5. 4
  6. 320
  7. 50
  8. 850
  9. 110
  10. 340
  11. 40
  12. 5
  13. joule (J)
  14. less effort
  15. 460
  16. 150
  17. 380
  18. 390
  19. through a distance
  20. 5
  21. 600
  22. 500
  23. 270
  24. 3
  25. 60
  26. 100
  27. 200
  28. 800
  29. load ÷ effort
  30. 3
  31. 850
  32. 2960
  33. 6
  34. 3
  35. 680
  36. 4
  37. 6
  38. 120
  39. 200
  40. 3

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