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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 39 · 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 300 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ 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?
  4. 4.🏋️ A force of 380 N did 1140 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 130 N pushes a cart 6 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 150 N did 150 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 40 N did 280 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  12. 12.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ Pushing a crate 8 m took 80 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 380 N did 380 J of work. How many metres did the object move?
  15. 15.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Pushing a crate 2 m took 340 J of work. What force was used, in newtons?
  19. 19.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  20. 20.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  21. 21.🏋️ A force of 160 N pushes a cart 1 m along the floor. How much work is done, in joules?
  22. 22.🏋️ 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?
  23. 23.🏋️ Pushing a crate 6 m took 1500 J of work. What force was used, in newtons?
  24. 24.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 200 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 490 N pushes a cart 3 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 240 N did 2400 J of work. How many metres did the object move?
  31. 31.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
  32. 32.🏋️ A 2 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.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 380 N pushes a cart 6 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ 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?
  37. 37.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 40 N did 160 J of work. How many metres did the object move?
  40. 40.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?

Answer key

  1. 150
  2. 2
  3. 380
  4. 3
  5. 780
  6. 1
  7. 7
  8. 4
  9. 1000
  10. 700
  11. joule (J)
  12. 130
  13. 10
  14. 1
  15. 100
  16. 70
  17. 750
  18. 170
  19. through a distance
  20. load ÷ effort
  21. 160
  22. 360
  23. 250
  24. 3
  25. 600
  26. 600
  27. 1470
  28. 3
  29. 3
  30. 10
  31. less effort
  32. 80
  33. 4
  34. 2280
  35. 150
  36. 150
  37. 60
  38. 750
  39. 4
  40. 5

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