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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 615 · 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 200 N pushes a cart 4 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 490 N did 3430 J of work. How many metres did the object move?
  3. 3.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A 7 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 machine lifts a load of 390 N when you push with 130 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.🏋️ A force of 470 N did 3290 J of work. How many metres did the object move?
  11. 11.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  12. 12.🏋️ A force of 40 N pushes a cart 1 m along the floor. How much work is done, in joules?
  13. 13.🏋️ 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)
  14. 14.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  17. 17.🏋️ A force of 390 N pushes a cart 5 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 390 N pushes a cart 10 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ 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?
  24. 24.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  25. 25.🏋️ A force of 310 N did 1550 J of work. How many metres did the object move?
  26. 26.🏋️ 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?
  27. 27.🏋️ Pushing a crate 6 m took 3000 J of work. What force was used, in newtons?
  28. 28.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 460 N did 1840 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 7 m took 630 J of work. What force was used, in newtons?
  32. 32.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 210 N pushes a cart 9 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 190 N pushes a cart 3 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 500 N pushes a cart 10 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 80 N pushes a cart 7 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?

Answer key

  1. 800
  2. 7
  3. 180
  4. 2
  5. 5
  6. 240
  7. 350
  8. 3
  9. load ÷ effort
  10. 7
  11. joule (J)
  12. 40
  13. 300
  14. 600
  15. 1500
  16. less effort
  17. 1950
  18. 6
  19. 350
  20. 3900
  21. 550
  22. 600
  23. 100
  24. through a distance
  25. 5
  26. 50
  27. 500
  28. 5
  29. 700
  30. 4
  31. 90
  32. 100
  33. 1890
  34. 1000
  35. 570
  36. 5000
  37. 760
  38. 800
  39. 560
  40. 2

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