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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 885 · 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 400 J of work. What force was used, in newtons?
  2. 2.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
  3. 3.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
  4. 4.🏋️ A force of 140 N did 280 J of work. How many metres did the object move?
  5. 5.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  7. 7.🏋️ A force of 410 N did 2870 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 120 N did 600 J of work. How many metres did the object move?
  10. 10.🏋️ Pushing a crate 6 m took 2820 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 80 N pushes a cart 6 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 10 N did 50 J of work. How many metres did the object move?
  14. 14.🏋️ Pushing a crate 3 m took 180 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 20 N pushes a cart 4 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 300 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 600 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 340 N pushes a cart 10 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  21. 21.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  22. 22.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 5 m took 1850 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 140 N did 1120 J of work. How many metres did the object move?
  26. 26.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ 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?
  28. 28.🏋️ A force of 380 N did 760 J of work. How many metres did the object move?
  29. 29.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ 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?
  31. 31.🏋️ A force of 260 N did 2600 J of work. How many metres did the object move?
  32. 32.🏋️ 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)
  33. 33.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 130 N did 1040 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 5 m took 1950 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 30 N pushes a cart 3 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 480 N did 2400 J of work. How many metres did the object move?
  40. 40.🏋️ Pushing a crate 7 m took 2310 J of work. What force was used, in newtons?

Answer key

  1. 400
  2. through a distance
  3. no, work stays the same
  4. 2
  5. 550
  6. less effort
  7. 7
  8. 4
  9. 5
  10. 470
  11. 480
  12. 750
  13. 5
  14. 60
  15. 80
  16. 150
  17. 100
  18. 3400
  19. 5
  20. load ÷ effort
  21. joule (J)
  22. 300
  23. 5
  24. 370
  25. 8
  26. 700
  27. 900
  28. 2
  29. 160
  30. 650
  31. 10
  32. 750
  33. 2
  34. 250
  35. 8
  36. 390
  37. 90
  38. 6
  39. 5
  40. 330

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