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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 998 · 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.

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  1. 1.🏋️ A force of 290 N pushes a cart 3 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
  3. 3.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 450 N pushes a cart 10 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 1 m took 190 J of work. What force was used, in newtons?
  7. 7.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  8. 8.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  10. 10.🏋️ A force of 160 N pushes a cart 7 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
  13. 13.🏋️ A force of 470 N pushes a cart 9 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 40 N did 280 J of work. How many metres did the object move?
  15. 15.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 320 N pushes a cart 5 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 2 m took 440 J of work. What force was used, in newtons?
  19. 19.🏋️ Pushing a crate 1 m took 20 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 40 N pushes a cart 9 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 130 N did 130 J of work. How many metres did the object move?
  22. 22.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 300 N pushes a cart 3 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 230 N did 1840 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 380 N pushes a cart 8 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 210 N did 1890 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 500 N did 3500 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 280 N pushes a cart 7 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 450 N did 2700 J of work. How many metres did the object move?
  36. 36.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 360 N did 2880 J of work. How many metres did the object move?
  38. 38.🏋️ A 20 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 smooth ramp is 6 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ 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?

Answer key

  1. 870
  2. no, work stays the same
  3. 6
  4. 4500
  5. 6
  6. 190
  7. joule (J)
  8. 3
  9. less effort
  10. 1120
  11. 2
  12. load ÷ effort
  13. 4230
  14. 7
  15. 3
  16. 300
  17. 1600
  18. 220
  19. 20
  20. 360
  21. 1
  22. 2
  23. 6
  24. 900
  25. 8
  26. 3040
  27. 9
  28. 7
  29. 1960
  30. 6
  31. 320
  32. 4
  33. 750
  34. 5
  35. 6
  36. 200
  37. 8
  38. 600
  39. 400
  40. 140

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