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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 443 · 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 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  3. 3.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  4. 4.🏋️ 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?
  5. 5.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 10 m took 4900 J of work. What force was used, in newtons?
  7. 7.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 30 N did 240 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 490 N pushes a cart 8 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Pushing a crate 2 m took 760 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 220 N pushes a cart 10 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 210 N did 840 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 60 N pushes a cart 2 m along the floor. How much work is done, in joules?
  15. 15.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 330 N pushes a cart 3 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 420 N pushes a cart 4 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 100 N pushes a cart 6 m along the floor. How much work is done, in joules?
  23. 23.🏋️ 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)
  24. 24.🏋️ A force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  26. 26.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ 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)
  28. 28.🏋️ 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?
  29. 29.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 480 N pushes a cart 4 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 390 N did 1170 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 130 N pushes a cart 7 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
  35. 35.🏋️ 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?
  36. 36.🏋️ A force of 440 N did 2200 J of work. How many metres did the object move?
  37. 37.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 290 N pushes a cart 1 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 80 N pushes a cart 3 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 120 N pushes a cart 3 m along the floor. How much work is done, in joules?

Answer key

  1. 30
  2. less effort
  3. no, work stays the same
  4. 240
  5. 5
  6. 490
  7. 4
  8. 1500
  9. 8
  10. 3920
  11. 380
  12. 2200
  13. 4
  14. 120
  15. 720
  16. 990
  17. 50
  18. 4
  19. 1680
  20. 150
  21. 80
  22. 600
  23. 550
  24. 880
  25. load ÷ effort
  26. 5
  27. 200
  28. 200
  29. 2
  30. 1920
  31. 800
  32. 3
  33. 910
  34. 1290
  35. 80
  36. 5
  37. 210
  38. 290
  39. 240
  40. 360

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