← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 183 · 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 80 N did 800 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ Pushing a crate 4 m took 1680 J of work. What force was used, in newtons?
  6. 6.🏋️ Pushing a crate 10 m took 2300 J of work. What force was used, in newtons?
  7. 7.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) effort ÷ load (d) load × effort
  9. 9.🏋️ A force of 160 N pushes a cart 3 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A 20 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 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)
  13. 13.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 80 N pushes a cart 7 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 160 N did 160 J of work. How many metres did the object move?
  17. 17.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  19. 19.🏋️ A force of 500 N pushes a cart 7 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ Pushing a crate 6 m took 780 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 30 N did 30 J of work. How many metres did the object move?
  23. 23.🏋️ Pushing a crate 1 m took 360 J of work. What force was used, in newtons?
  24. 24.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 270 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, by half (d) yes, always
  29. 29.🏋️ A force of 10 N pushes a cart 9 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 9 m took 3870 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 140 N did 1400 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 250 N pushes a cart 10 m along the floor. How much work is done, in joules?
  33. 33.🏋️ 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)
  34. 34.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 490 N did 490 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 5 m took 500 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 10 m took 1200 J of work. What force was used, in newtons?
  38. 38.🏋️ 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?
  39. 39.🏋️ A force of 320 N pushes a cart 7 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly

Answer key

  1. 10
  2. 100
  3. 100
  4. 400
  5. 420
  6. 230
  7. 4
  8. load ÷ effort
  9. 480
  10. 270
  11. 200
  12. 1000
  13. 350
  14. 560
  15. 6
  16. 1
  17. 5
  18. less effort
  19. 3500
  20. 2
  21. 130
  22. 1
  23. 360
  24. 560
  25. 4
  26. 3
  27. 270
  28. no, work stays the same
  29. 90
  30. 430
  31. 10
  32. 2500
  33. 700
  34. 750
  35. 1
  36. 100
  37. 120
  38. 330
  39. 2240
  40. through a distance

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