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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 942 · 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 4 m long and rises 2 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ Pushing a crate 7 m took 1400 J of work. What force was used, in newtons?
  3. 3.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  4. 4.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  5. 5.🏋️ 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)
  6. 6.🏋️ A force of 360 N pushes a cart 4 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  8. 8.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 380 N pushes a cart 6 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ Pushing a crate 1 m took 110 J of work. What force was used, in newtons?
  14. 14.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ Pushing a crate 1 m took 360 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 30 N pushes a cart 2 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ 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?
  20. 20.🏋️ A force of 170 N pushes a cart 10 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 3 m took 1110 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 3 m took 990 J of work. What force was used, in newtons?
  23. 23.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A force of 10 N pushes a cart 8 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 100 N did 500 J of work. How many metres did the object move?
  27. 27.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Pushing a crate 10 m took 500 J of work. What force was used, in newtons?
  29. 29.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  30. 30.🏋️ A force of 90 N did 810 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 40 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ 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?
  33. 33.🏋️ Pushing a crate 1 m took 230 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 300 N pushes a cart 3 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 310 N did 930 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 450 N pushes a cart 7 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Pushing a crate 1 m took 250 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?

Answer key

  1. 50
  2. 200
  3. joule (J)
  4. through a distance
  5. 950
  6. 1440
  7. less effort
  8. 5
  9. 350
  10. 400
  11. 2280
  12. 5
  13. 110
  14. 950
  15. 360
  16. 60
  17. 120
  18. 6
  19. 20
  20. 1700
  21. 370
  22. 330
  23. 60
  24. 80
  25. 400
  26. 5
  27. 5
  28. 50
  29. no, work stays the same
  30. 9
  31. 80
  32. 720
  33. 230
  34. 900
  35. 550
  36. 3
  37. 3150
  38. 250
  39. 600
  40. 5

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