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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 102 · 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) no effort (c) more effort (d) less effort
  2. 2.🏋️ A force of 320 N did 1280 J of work. How many metres did the object move?
  3. 3.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Pushing a crate 6 m took 1440 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 190 N pushes a cart 2 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Pushing a crate 6 m took 1680 J of work. What force was used, in newtons?
  7. 7.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  8. 8.🏋️ Pushing a crate 1 m took 170 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 20 N pushes a cart 5 m along the floor. How much work is done, in joules?
  11. 11.🏋️ 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?
  12. 12.🏋️ A force of 10 N did 80 J of work. How many metres did the object move?
  13. 13.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ 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)
  17. 17.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 470 N did 3290 J of work. How many metres did the object move?
  19. 19.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  21. 21.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) yes, always (d) only on Mondays
  22. 22.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A 17 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 260 N pushes a cart 8 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 450 N did 900 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 70 N pushes a cart 5 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 1 m took 210 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 250 N did 2000 J of work. How many metres did the object move?
  31. 31.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 90 N did 630 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 50 N pushes a cart 10 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 300 N did 1500 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 440 N pushes a cart 9 m along the floor. How much work is done, in joules?
  36. 36.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 390 N pushes a cart 2 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 90 N pushes a cart 3 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 5 m took 850 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 90 N pushes a cart 7 m along the floor. How much work is done, in joules?

Answer key

  1. less effort
  2. 4
  3. 3
  4. 240
  5. 380
  6. 280
  7. joule (J)
  8. 170
  9. 2
  10. 100
  11. 170
  12. 8
  13. 550
  14. 700
  15. 750
  16. 300
  17. 850
  18. 7
  19. 250
  20. through a distance
  21. no, work stays the same
  22. 300
  23. 340
  24. 2080
  25. 280
  26. 5
  27. 2
  28. 350
  29. 210
  30. 8
  31. 600
  32. 7
  33. 500
  34. 5
  35. 3960
  36. 900
  37. 780
  38. 270
  39. 170
  40. 630

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