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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 144 · 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 240 N did 480 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 130 N did 910 J of work. How many metres did the object move?
  3. 3.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  5. 5.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  6. 6.🏋️ Pushing a crate 10 m took 5000 J of work. What force was used, in newtons?
  7. 7.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  8. 8.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A force of 310 N pushes a cart 4 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 210 N did 1470 J of work. How many metres did the object move?
  12. 12.🏋️ 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?
  13. 13.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  17. 17.🏋️ A force of 30 N did 270 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 440 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 60 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 200 N did 400 J of work. How many metres did the object move?
  21. 21.🏋️ 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?
  22. 22.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Pushing a crate 10 m took 1600 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 120 N pushes a cart 10 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 10 m took 2900 J of work. What force was used, in newtons?
  29. 29.🏋️ 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?
  30. 30.🏋️ A force of 450 N did 450 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 420 N did 840 J of work. How many metres did the object move?
  32. 32.🏋️ Pushing a crate 10 m took 1100 J of work. What force was used, in newtons?
  33. 33.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ Pushing a crate 3 m took 780 J of work. What force was used, in newtons?
  36. 36.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ Pushing a crate 3 m took 150 J of work. What force was used, in newtons?
  38. 38.🏋️ 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?
  39. 39.🏋️ Pushing a crate 4 m took 880 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 5 m took 2450 J of work. What force was used, in newtons?

Answer key

  1. 2
  2. 7
  3. 450
  4. no, work stays the same
  5. joule (J)
  6. 500
  7. through a distance
  8. 180
  9. 160
  10. 1240
  11. 7
  12. 280
  13. 200
  14. 120
  15. 950
  16. less effort
  17. 9
  18. 1320
  19. 180
  20. 2
  21. 30
  22. 4
  23. 3
  24. 500
  25. 160
  26. 900
  27. 1200
  28. 290
  29. 40
  30. 1
  31. 2
  32. 110
  33. 50
  34. 5
  35. 260
  36. 100
  37. 50
  38. 570
  39. 220
  40. 490

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