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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 516 · 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 machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  3. 3.🏋️ A force of 230 N pushes a cart 9 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 260 N did 780 J of work. How many metres did the object move?
  5. 5.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  6. 6.🏋️ Pushing a crate 10 m took 3000 J of work. What force was used, in newtons?
  7. 7.🏋️ 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?
  8. 8.🏋️ A force of 380 N did 380 J of work. How many metres did the object move?
  9. 9.🏋️ 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?
  10. 10.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  12. 12.🏋️ Pushing a crate 2 m took 720 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 290 N did 2030 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 480 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 270 N pushes a cart 10 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 190 N pushes a cart 4 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Pushing a crate 1 m took 20 J of work. What force was used, in newtons?
  18. 18.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  20. 20.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 430 N did 4300 J of work. How many metres did the object move?
  23. 23.🏋️ 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?
  24. 24.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 280 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 240 N did 2400 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 200 N pushes a cart 10 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 70 N did 560 J of work. How many metres did the object move?
  33. 33.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ Pushing a crate 1 m took 290 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 10 m took 4500 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 250 N did 250 J of work. How many metres did the object move?

Answer key

  1. 2
  2. no, work stays the same
  3. 2070
  4. 3
  5. joule (J)
  6. 300
  7. 550
  8. 1
  9. 30
  10. less effort
  11. load ÷ effort
  12. 360
  13. 7
  14. 1440
  15. 2700
  16. 760
  17. 20
  18. 150
  19. through a distance
  20. 380
  21. 100
  22. 10
  23. 720
  24. 450
  25. 560
  26. 10
  27. 2000
  28. 5
  29. 950
  30. 80
  31. 850
  32. 8
  33. 50
  34. 290
  35. 5
  36. 450
  37. 3
  38. 4
  39. 3
  40. 1

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