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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 988 · 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.🏋️ Pushing a crate 1 m took 320 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 30 N did 240 J of work. How many metres did the object move?
  3. 3.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 170 N did 340 J of work. How many metres did the object move?
  5. 5.🏋️ A 5 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 130 N pushes a cart 6 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  8. 8.🏋️ A force of 210 N pushes a cart 10 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A force of 210 N did 2100 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 1 m took 130 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 70 N did 490 J of work. How many metres did the object move?
  13. 13.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 220 N pushes a cart 10 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Pushing a crate 6 m took 2340 J of work. What force was used, in newtons?
  19. 19.🏋️ Pushing a crate 2 m took 420 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 160 N pushes a cart 10 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 10 m took 3100 J of work. What force was used, in newtons?
  23. 23.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Pushing a crate 10 m took 4100 J of work. What force was used, in newtons?
  26. 26.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  27. 27.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 1 m took 230 J of work. What force was used, in newtons?
  29. 29.🏋️ 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?
  30. 30.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  31. 31.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  33. 33.🏋️ Pushing a crate 5 m took 1200 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 10 m took 2900 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 400 N did 1600 J of work. How many metres did the object move?
  36. 36.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 60 N did 540 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 900 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?

Answer key

  1. 320
  2. 8
  3. 800
  4. 2
  5. 100
  6. 780
  7. less effort
  8. 2100
  9. 80
  10. 10
  11. 130
  12. 7
  13. 250
  14. 2200
  15. 800
  16. 900
  17. 800
  18. 390
  19. 210
  20. 4
  21. 1600
  22. 310
  23. 50
  24. 350
  25. 410
  26. joule (J)
  27. 300
  28. 230
  29. 200
  30. no, work stays the same
  31. 5
  32. through a distance
  33. 240
  34. 290
  35. 4
  36. 40
  37. 750
  38. 9
  39. 300
  40. 4

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