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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 583 · 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 130 N did 1040 J of work. How many metres did the object move?
  2. 2.🏋️ Pushing a crate 7 m took 3220 J of work. What force was used, in newtons?
  3. 3.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 200 N pushes a cart 10 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A force of 100 N did 800 J of work. How many metres did the object move?
  7. 7.🏋️ Pushing a crate 1 m took 140 J of work. What force was used, in newtons?
  8. 8.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  10. 10.🏋️ Pushing a crate 2 m took 400 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 390 N did 3120 J of work. How many metres did the object move?
  13. 13.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 40 N did 400 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 260 N pushes a cart 5 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 430 N pushes a cart 4 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 170 N did 1190 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 210 N pushes a cart 10 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 270 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  27. 27.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  29. 29.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  31. 31.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  32. 32.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 340 N pushes a cart 7 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 410 N pushes a cart 9 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Pushing a crate 7 m took 3430 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ 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?

Answer key

  1. 8
  2. 460
  3. 3
  4. 2000
  5. 400
  6. 8
  7. 140
  8. 5
  9. load ÷ effort
  10. 200
  11. 4
  12. 8
  13. 4
  14. 220
  15. 10
  16. 70
  17. 5
  18. 6
  19. 4
  20. 1300
  21. 1720
  22. 200
  23. 7
  24. 2100
  25. 540
  26. joule (J)
  27. 3
  28. less effort
  29. 300
  30. no, work stays the same
  31. through a distance
  32. 550
  33. 180
  34. 1000
  35. 2380
  36. 300
  37. 3690
  38. 490
  39. 650
  40. 330

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