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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 987 · 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 350 N pushes a cart 1 m along the floor. How much work is done, in joules?
  2. 2.🏋️ 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?
  3. 3.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ Pushing a crate 8 m took 1040 J of work. What force was used, in newtons?
  5. 5.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  6. 6.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  8. 8.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 3 m took 180 J of work. What force was used, in newtons?
  10. 10.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 40 N pushes a cart 8 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 220 N pushes a cart 6 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 360 N did 1440 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 330 N did 330 J of work. How many metres did the object move?
  15. 15.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  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 force of 130 N did 1170 J of work. How many metres did the object move?
  18. 18.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  19. 19.🏋️ A force of 280 N did 2240 J of work. How many metres did the object move?
  20. 20.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 470 N pushes a cart 3 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 260 N pushes a cart 10 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Pushing a crate 5 m took 2500 J of work. What force was used, in newtons?
  26. 26.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  27. 27.🏋️ A force of 470 N pushes a cart 6 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 20 N pushes a cart 5 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 40 N did 240 J of work. How many metres did the object move?
  33. 33.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ 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)
  37. 37.🏋️ Pushing a crate 10 m took 1000 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 3 m took 780 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 420 N did 2520 J of work. How many metres did the object move?
  40. 40.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 350
  2. 130
  3. 450
  4. 130
  5. through a distance
  6. 6
  7. load ÷ effort
  8. 4
  9. 60
  10. 300
  11. 320
  12. 1320
  13. 4
  14. 1
  15. 4
  16. 60
  17. 9
  18. no, work stays the same
  19. 8
  20. 120
  21. 1410
  22. 3
  23. 2600
  24. 500
  25. 500
  26. joule (J)
  27. 2820
  28. 550
  29. 3
  30. 100
  31. 160
  32. 6
  33. 250
  34. 400
  35. 500
  36. 150
  37. 100
  38. 260
  39. 6
  40. 700

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