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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 747 · 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) no, work stays the same (c) yes, always (d) yes, by half
  2. 2.🏋️ A force of 30 N did 60 J of work. How many metres did the object move?
  3. 3.🏋️ Pushing a crate 7 m took 2310 J of work. What force was used, in newtons?
  4. 4.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  5. 5.🏋️ A 9 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  7. 7.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A force of 60 N did 120 J of work. How many metres did the object move?
  9. 9.🏋️ 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)
  10. 10.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Pushing a crate 10 m took 3200 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 210 N pushes a cart 4 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 170 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 60 N did 300 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 350 N pushes a cart 3 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 6 m took 2520 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 60 N pushes a cart 2 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  22. 22.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 240 N pushes a cart 3 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 10 N did 30 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Pushing a crate 6 m took 480 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 50 N pushes a cart 9 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 500 N pushes a cart 5 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 40 N did 320 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 40 N did 40 J of work. How many metres did the object move?
  33. 33.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 350 N did 700 J of work. How many metres did the object move?
  35. 35.🏋️ Pushing a crate 6 m took 840 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 5 m took 700 J of work. What force was used, in newtons?
  37. 37.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ Pushing a crate 10 m took 4800 J of work. What force was used, in newtons?

Answer key

  1. no, work stays the same
  2. 2
  3. 330
  4. joule (J)
  5. 450
  6. less effort
  7. 60
  8. 2
  9. 950
  10. 850
  11. 320
  12. 840
  13. 340
  14. 2
  15. 6
  16. 5
  17. 1050
  18. 420
  19. 120
  20. 800
  21. through a distance
  22. 650
  23. 720
  24. 300
  25. 3
  26. 5
  27. 80
  28. 450
  29. 2500
  30. 30
  31. 8
  32. 1
  33. 1000
  34. 2
  35. 140
  36. 140
  37. 70
  38. 30
  39. 150
  40. 480

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