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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 262 · 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.

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  1. 1.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 240 N did 1680 J of work. How many metres did the object move?
  3. 3.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ Pushing a crate 7 m took 1680 J of work. What force was used, in newtons?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  7. 7.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  8. 8.🏋️ A force of 200 N did 600 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 10 N pushes a cart 9 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
  11. 11.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 330 N did 1320 J of work. How many metres did the object move?
  13. 13.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 170 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 120 N pushes a cart 1 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 90 N did 270 J of work. How many metres did the object move?
  20. 20.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  23. 23.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 8 m took 2480 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 2 m took 20 J of work. What force was used, in newtons?
  28. 28.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ Pushing a crate 2 m took 860 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 1 m took 120 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 120 N pushes a cart 7 m along the floor. How much work is done, in joules?
  32. 32.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  33. 33.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A force of 120 N pushes a cart 10 m along the floor. How much work is done, in joules?
  35. 35.🏋️ 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)
  36. 36.🏋️ 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?
  37. 37.🏋️ 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?
  38. 38.🏋️ A force of 390 N pushes a cart 3 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 180 N did 1800 J of work. How many metres did the object move?
  40. 40.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?

Answer key

  1. 3
  2. 7
  3. 2
  4. 250
  5. 240
  6. load ÷ effort
  7. through a distance
  8. 3
  9. 90
  10. less effort
  11. 950
  12. 4
  13. 260
  14. 510
  15. 300
  16. 3
  17. 120
  18. 450
  19. 3
  20. 700
  21. 1000
  22. no, work stays the same
  23. 950
  24. 150
  25. 70
  26. 310
  27. 10
  28. 440
  29. 430
  30. 120
  31. 840
  32. joule (J)
  33. 160
  34. 1200
  35. 900
  36. 320
  37. 510
  38. 1170
  39. 10
  40. 4

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