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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 608 · 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 6 m long and rises 1 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  3. 3.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Pushing a crate 7 m took 3150 J of work. What force was used, in newtons?
  5. 5.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A force of 430 N pushes a cart 6 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ 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)
  9. 9.🏋️ Pushing a crate 3 m took 60 J of work. What force was used, in newtons?
  10. 10.🏋️ Pushing a crate 1 m took 440 J of work. What force was used, in newtons?
  11. 11.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  12. 12.🏋️ Pushing a crate 4 m took 360 J of work. What force was used, in newtons?
  13. 13.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ 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?
  15. 15.🏋️ Pushing a crate 9 m took 1080 J of work. What force was used, in newtons?
  16. 16.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
  18. 18.🏋️ 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?
  19. 19.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  21. 21.🏋️ 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?
  22. 22.🏋️ A force of 310 N pushes a cart 8 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A 9 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.🏋️ A force of 350 N pushes a cart 6 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 100 N did 900 J of work. How many metres did the object move?
  26. 26.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ Pushing a crate 5 m took 2200 J of work. What force was used, in newtons?
  29. 29.🏋️ A 17 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.🏋️ Pushing a crate 5 m took 2000 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 40 N pushes a cart 10 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A 12 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.🏋️ Pushing a crate 1 m took 380 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ Pushing a crate 5 m took 1250 J of work. What force was used, in newtons?

Answer key

  1. 700
  2. through a distance
  3. 3
  4. 450
  5. 220
  6. 2580
  7. 650
  8. 50
  9. 20
  10. 440
  11. joule (J)
  12. 90
  13. 50
  14. 60
  15. 120
  16. 50
  17. no, work stays the same
  18. 100
  19. 2
  20. load ÷ effort
  21. 160
  22. 2480
  23. 180
  24. 2100
  25. 9
  26. 60
  27. 600
  28. 440
  29. 170
  30. 400
  31. 2
  32. 400
  33. 900
  34. 200
  35. 2
  36. 4
  37. 480
  38. 380
  39. 850
  40. 250

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