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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 258 · 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) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  2. 2.🏋️ A force of 190 N pushes a cart 8 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ Pushing a crate 6 m took 720 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 210 N did 630 J of work. How many metres did the object move?
  6. 6.🏋️ A force of 100 N pushes a cart 5 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 10 m took 4300 J of work. What force was used, in newtons?
  8. 8.🏋️ Pushing a crate 3 m took 480 J of work. What force was used, in newtons?
  9. 9.🏋️ A force of 340 N did 2380 J of work. How many metres did the object move?
  10. 10.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 360 N pushes a cart 9 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ 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?
  18. 18.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ 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?
  20. 20.🏋️ Pushing a crate 2 m took 120 J of work. What force was used, in newtons?
  21. 21.🏋️ 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)
  22. 22.🏋️ A 7 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 90 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 200 N pushes a cart 10 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Pushing a crate 9 m took 1170 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 7 m took 1190 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 390 N did 390 J of work. How many metres did the object move?
  29. 29.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  32. 32.🏋️ A force of 340 N did 680 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 1 m took 280 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 20 N pushes a cart 1 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  36. 36.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 460 N did 4600 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 340 N pushes a cart 6 m along the floor. How much work is done, in joules?
  39. 39.🏋️ 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?
  40. 40.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. no, work stays the same
  2. 1520
  3. 40
  4. 120
  5. 3
  6. 500
  7. 430
  8. 160
  9. 7
  10. 600
  11. 3
  12. 450
  13. 2
  14. 250
  15. 3240
  16. 50
  17. 60
  18. 400
  19. 90
  20. 60
  21. 550
  22. 140
  23. 180
  24. 2000
  25. 200
  26. 130
  27. 170
  28. 1
  29. 800
  30. 5
  31. joule (J)
  32. 2
  33. 280
  34. 20
  35. through a distance
  36. 750
  37. 10
  38. 2040
  39. 160
  40. 120

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