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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 105 · 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 10 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A force of 300 N pushes a cart 10 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A force of 340 N pushes a cart 4 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 6 m took 600 J of work. What force was used, in newtons?
  9. 9.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  11. 11.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ 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)
  15. 15.🏋️ Pushing a crate 10 m took 300 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 140 N did 1400 J of work. How many metres did the object move?
  17. 17.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  19. 19.🏋️ A 7 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 50 N pushes a cart 7 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 80 N pushes a cart 1 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 430 N did 430 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 430 N did 3010 J of work. How many metres did the object move?
  24. 24.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ Pushing a crate 8 m took 2560 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 250 N did 750 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 370 N did 2220 J of work. How many metres did the object move?
  29. 29.🏋️ 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?
  30. 30.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  31. 31.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
  32. 32.🏋️ A force of 110 N pushes a cart 1 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 360 N did 720 J of work. How many metres did the object move?
  34. 34.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  36. 36.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ Pushing a crate 1 m took 220 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 400 N did 1200 J of work. How many metres did the object move?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ Pushing a crate 7 m took 3080 J of work. What force was used, in newtons?

Answer key

  1. 150
  2. 200
  3. 3000
  4. 3
  5. 1360
  6. 900
  7. 800
  8. 100
  9. 500
  10. through a distance
  11. 30
  12. 1000
  13. 160
  14. 450
  15. 30
  16. 10
  17. 150
  18. no, work stays the same
  19. 140
  20. 350
  21. 80
  22. 1
  23. 7
  24. 160
  25. 500
  26. 320
  27. 3
  28. 6
  29. 100
  30. load ÷ effort
  31. less effort
  32. 110
  33. 2
  34. 2
  35. joule (J)
  36. 510
  37. 220
  38. 3
  39. 950
  40. 440

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