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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 190 · 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) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  2. 2.🏋️ A force of 410 N pushes a cart 2 m along the floor. How much work is done, in joules?
  3. 3.🏋️ 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?
  4. 4.🏋️ A force of 470 N did 1410 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 1700 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 480 N pushes a cart 7 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 10 N pushes a cart 8 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  11. 11.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
  12. 12.🏋️ An 8 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.🏋️ A force of 290 N pushes a cart 10 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 3 m took 1350 J of work. What force was used, in newtons?
  15. 15.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  16. 16.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ 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?
  20. 20.🏋️ 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)
  21. 21.🏋️ A force of 130 N did 260 J of work. How many metres did the object move?
  22. 22.🏋️ 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?
  23. 23.🏋️ A force of 360 N did 2520 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 140 N did 840 J of work. How many metres did the object move?
  25. 25.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 90 N did 360 J of work. How many metres did the object move?
  28. 28.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 260 N did 1040 J of work. How many metres did the object move?
  31. 31.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 340 N did 680 J of work. How many metres did the object move?
  35. 35.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  36. 36.🏋️ A force of 40 N pushes a cart 9 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 350 N did 3150 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 450 N pushes a cart 2 m along the floor. How much work is done, in joules?
  39. 39.🏋️ 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)
  40. 40.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. no, work stays the same
  2. 820
  3. 20
  4. 3
  5. 850
  6. 570
  7. 3360
  8. 390
  9. 80
  10. through a distance
  11. 30
  12. 320
  13. 2900
  14. 450
  15. joule (J)
  16. 3
  17. 2
  18. 850
  19. 120
  20. 100
  21. 2
  22. 180
  23. 7
  24. 6
  25. 500
  26. 2
  27. 4
  28. 6
  29. 900
  30. 4
  31. 250
  32. 950
  33. 350
  34. 2
  35. load ÷ effort
  36. 360
  37. 9
  38. 900
  39. 900
  40. 500

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