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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 291 · 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.🏋️ A force of 40 N did 320 J of work. How many metres did the object move?
  2. 2.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ Pushing a crate 3 m took 210 J of work. What force was used, in newtons?
  4. 4.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  5. 5.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  6. 6.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ Pushing a crate 10 m took 1500 J of work. What force was used, in newtons?
  9. 9.🏋️ Pushing a crate 1 m took 50 J of work. What force was used, in newtons?
  10. 10.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
  11. 11.🏋️ A force of 340 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ 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
  13. 13.🏋️ A 4 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 machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 290 N pushes a cart 3 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 420 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Pushing a crate 10 m took 1200 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 390 N pushes a cart 7 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ 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)
  26. 26.🏋️ A force of 180 N did 1080 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 480 N pushes a cart 10 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 330 N pushes a cart 8 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 60 N did 540 J of work. How many metres did the object move?
  30. 30.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 490 N did 980 J of work. How many metres did the object move?
  32. 32.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A force of 430 N pushes a cart 6 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 4 m took 80 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 2 m took 820 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 8 m took 720 J of work. What force was used, in newtons?
  37. 37.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  39. 39.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 210 N pushes a cart 7 m along the floor. How much work is done, in joules?

Answer key

  1. 8
  2. 280
  3. 70
  4. load ÷ effort
  5. through a distance
  6. 5
  7. 90
  8. 150
  9. 50
  10. less effort
  11. 340
  12. no, work stays the same
  13. 80
  14. 3
  15. 870
  16. 700
  17. 840
  18. 6
  19. 650
  20. 1000
  21. 700
  22. 120
  23. 2730
  24. 2
  25. 450
  26. 6
  27. 4800
  28. 2640
  29. 9
  30. 650
  31. 2
  32. 150
  33. 2580
  34. 20
  35. 410
  36. 90
  37. 1000
  38. joule (J)
  39. 150
  40. 1470

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