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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 918 · 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 smooth ramp is 8 m long and rises 2 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 420 N did 2100 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 470 N did 1410 J of work. How many metres did the object move?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  7. 7.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) metre (m) (d) watt hour
  8. 8.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 3 m took 960 J of work. What force was used, in newtons?
  13. 13.🏋️ 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?
  14. 14.🏋️ A force of 170 N did 1700 J of work. How many metres did the object move?
  15. 15.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  16. 16.🏋️ 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?
  17. 17.🏋️ A force of 220 N pushes a cart 3 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 110 N did 330 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 320 N did 2240 J of work. How many metres did the object move?
  21. 21.🏋️ Pushing a crate 1 m took 430 J of work. What force was used, in newtons?
  22. 22.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ 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?
  24. 24.🏋️ A force of 50 N did 400 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 500 N did 3000 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 290 N pushes a cart 4 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 240 N pushes a cart 9 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  33. 33.🏋️ Pushing a crate 2 m took 660 J of work. What force was used, in newtons?
  34. 34.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 50 N did 200 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 6 m took 720 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 80 N did 80 J of work. How many metres did the object move?

Answer key

  1. 650
  2. 4
  3. 5
  4. 5
  5. 3
  6. load ÷ effort
  7. joule (J)
  8. 950
  9. 100
  10. 500
  11. 5
  12. 320
  13. 110
  14. 10
  15. less effort
  16. 60
  17. 660
  18. 3
  19. 220
  20. 7
  21. 430
  22. 150
  23. 300
  24. 8
  25. 6
  26. 1160
  27. 20
  28. 20
  29. 5
  30. 2160
  31. 360
  32. no, work stays the same
  33. 330
  34. 120
  35. 6
  36. 260
  37. 4
  38. 120
  39. 210
  40. 1

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