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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 649 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 320 N pushes a cart 1 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 400 N pushes a cart 5 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  6. 6.🏋️ Pushing a crate 5 m took 1100 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 10 N pushes a cart 2 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ Pushing a crate 7 m took 1190 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 440 N did 1320 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 100 N pushes a cart 5 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 290 N pushes a cart 1 m along the floor. How much work is done, in joules?
  16. 16.🏋️ 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?
  17. 17.🏋️ A force of 310 N pushes a cart 4 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  19. 19.🏋️ A 15 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 490 N pushes a cart 5 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 5 m took 2400 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 1 m took 400 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  25. 25.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 40 N did 120 J of work. How many metres did the object move?
  27. 27.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Pushing a crate 2 m took 20 J of work. What force was used, in newtons?
  29. 29.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 390 N pushes a cart 7 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
  32. 32.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 160 N pushes a cart 5 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 90 N did 900 J of work. How many metres did the object move?
  35. 35.🏋️ 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)
  36. 36.🏋️ A force of 200 N did 400 J of work. How many metres did the object move?
  37. 37.🏋️ 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?
  38. 38.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ Pushing a crate 10 m took 4500 J of work. What force was used, in newtons?

Answer key

  1. 3
  2. 320
  3. 5
  4. 2000
  5. through a distance
  6. 220
  7. 20
  8. 500
  9. 650
  10. 170
  11. 3
  12. 1380
  13. 500
  14. 900
  15. 290
  16. 200
  17. 1240
  18. load ÷ effort
  19. 300
  20. 2450
  21. 480
  22. 400
  23. 6
  24. joule (J)
  25. 4
  26. 3
  27. 6
  28. 10
  29. 320
  30. 2730
  31. no, work stays the same
  32. 6
  33. 800
  34. 10
  35. 700
  36. 2
  37. 120
  38. 300
  39. 600
  40. 450

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