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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 205 · 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 7 m took 2170 J of work. What force was used, in newtons?
  2. 2.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A force of 260 N did 2340 J of work. How many metres did the object move?
  4. 4.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, by half (d) yes, always
  5. 5.🏋️ A force of 150 N pushes a cart 8 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 250 N did 250 J of work. How many metres did the object move?
  7. 7.🏋️ Pushing a crate 5 m took 1100 J of work. What force was used, in newtons?
  8. 8.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  10. 10.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ 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?
  13. 13.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  14. 14.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 500 N did 1500 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 220 N did 660 J of work. How many metres did the object move?
  17. 17.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ 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?
  20. 20.🏋️ Pushing a crate 10 m took 3600 J of work. What force was used, in newtons?
  21. 21.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  24. 24.🏋️ A force of 290 N pushes a cart 8 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ 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?
  27. 27.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ Pushing a crate 9 m took 2160 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 360 N pushes a cart 1 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 4 m took 720 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 8 m took 2800 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 10 m took 3500 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 8 m took 1440 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 70 N did 700 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 4 m took 1360 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 100 N did 400 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 110 N did 220 J of work. How many metres did the object move?

Answer key

  1. 310
  2. 150
  3. 9
  4. no, work stays the same
  5. 1200
  6. 1
  7. 220
  8. 350
  9. less effort
  10. 510
  11. 20
  12. 800
  13. through a distance
  14. 100
  15. 3
  16. 3
  17. 900
  18. 180
  19. 180
  20. 360
  21. 3
  22. 750
  23. joule (J)
  24. 2320
  25. 950
  26. 220
  27. 240
  28. 240
  29. 360
  30. 180
  31. 350
  32. 350
  33. 180
  34. 400
  35. 2
  36. 2
  37. 10
  38. 340
  39. 4
  40. 2

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