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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 260 · 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.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  2. 2.🏋️ A force of 210 N did 210 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 280 N pushes a cart 8 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A force of 450 N pushes a cart 8 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 110 N pushes a cart 9 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ 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?
  10. 10.🏋️ A force of 90 N did 90 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 90 N pushes a cart 7 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ Pushing a crate 2 m took 40 J of work. What force was used, in newtons?
  14. 14.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  15. 15.🏋️ A force of 200 N did 1800 J of work. How many metres did the object move?
  16. 16.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  17. 17.🏋️ A force of 260 N did 1300 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 350 N pushes a cart 6 m along the floor. How much work is done, in joules?
  19. 19.🏋️ 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)
  20. 20.🏋️ A force of 100 N pushes a cart 10 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 370 N pushes a cart 7 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A 12 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 smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 10 N pushes a cart 2 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  26. 26.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ Pushing a crate 3 m took 210 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 140 N pushes a cart 5 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 400 N did 3200 J of work. How many metres did the object move?
  33. 33.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  34. 34.🏋️ Pushing a crate 7 m took 2310 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 1 m took 110 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 290 N did 290 J of work. How many metres did the object move?
  37. 37.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 360 N did 1440 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 260 N did 520 J of work. How many metres did the object move?

Answer key

  1. no, work stays the same
  2. 1
  3. 2240
  4. 130
  5. 3600
  6. 990
  7. 400
  8. 1000
  9. 220
  10. 1
  11. 630
  12. 400
  13. 20
  14. joule (J)
  15. 9
  16. less effort
  17. 5
  18. 2100
  19. 100
  20. 1000
  21. 2590
  22. 360
  23. 100
  24. 20
  25. through a distance
  26. 50
  27. 70
  28. 700
  29. 450
  30. 400
  31. 3
  32. 8
  33. load ÷ effort
  34. 330
  35. 110
  36. 1
  37. 600
  38. 4
  39. 4
  40. 2

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