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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 278 · 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 140 N pushes a cart 6 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  5. 5.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
  6. 6.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 190 N did 1140 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 500 N did 3500 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Pushing a crate 3 m took 1170 J of work. What force was used, in newtons?
  11. 11.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 100 N pushes a cart 10 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  14. 14.🏋️ Pushing a crate 8 m took 2960 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 270 N did 1080 J of work. How many metres did the object move?
  16. 16.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 440 N pushes a cart 8 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 150 N pushes a cart 10 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 7 m took 1330 J of work. What force was used, in newtons?
  22. 22.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  23. 23.🏋️ A force of 290 N pushes a cart 5 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A 7 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.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  26. 26.🏋️ A force of 100 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ Pushing a crate 7 m took 1960 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 280 N pushes a cart 3 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 290 N pushes a cart 1 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 5 m took 1300 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 10 N pushes a cart 8 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 110 N pushes a cart 1 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Pushing a crate 8 m took 880 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 6 m took 1800 J of work. What force was used, in newtons?
  38. 38.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A force of 200 N did 1000 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 190 N did 570 J of work. How many metres did the object move?

Answer key

  1. 840
  2. 650
  3. 450
  4. no, work stays the same
  5. 120
  6. 6
  7. 6
  8. 7
  9. 1290
  10. 390
  11. 100
  12. 1000
  13. less effort
  14. 370
  15. 4
  16. 40
  17. 5
  18. 3520
  19. 4
  20. 1500
  21. 190
  22. joule (J)
  23. 1450
  24. 280
  25. load ÷ effort
  26. 300
  27. 280
  28. 840
  29. 300
  30. 60
  31. 290
  32. 260
  33. 80
  34. 110
  35. 650
  36. 110
  37. 300
  38. 250
  39. 5
  40. 3

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