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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 889 · 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 longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
  2. 2.🏋️ A force of 20 N did 60 J of work. How many metres did the object move?
  3. 3.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  6. 6.🏋️ A force of 280 N did 560 J of work. How many metres did the object move?
  7. 7.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  8. 8.🏋️ A force of 380 N did 1520 J of work. How many metres did the object move?
  9. 9.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
  10. 10.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ 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)
  13. 13.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ 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?
  15. 15.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  16. 16.🏋️ A force of 310 N did 3100 J of work. How many metres did the object move?
  17. 17.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 460 N did 1380 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 120 N pushes a cart 9 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A 9 kg box is lifted straight up by 1 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 4 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ 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?
  25. 25.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ 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)
  28. 28.🏋️ A force of 160 N pushes a cart 6 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 8 m took 2640 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 30 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 320 N pushes a cart 1 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 10 m took 1500 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 290 N pushes a cart 4 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 450 N pushes a cart 9 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ 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?

Answer key

  1. less effort
  2. 3
  3. 2
  4. 440
  5. through a distance
  6. 2
  7. joule (J)
  8. 4
  9. 120
  10. 750
  11. 900
  12. 50
  13. 6
  14. 170
  15. no, work stays the same
  16. 10
  17. 650
  18. 750
  19. 3
  20. 1080
  21. 90
  22. 1240
  23. 100
  24. 650
  25. 120
  26. 150
  27. 700
  28. 960
  29. 330
  30. 800
  31. 60
  32. 320
  33. 150
  34. 1160
  35. 40
  36. 6
  37. 6
  38. 4050
  39. 250
  40. 50

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