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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 628 · 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.🏋️ Pushing a crate 8 m took 3520 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 480 N pushes a cart 9 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 90 N did 720 J of work. How many metres did the object move?
  5. 5.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Pushing a crate 5 m took 2300 J of work. What force was used, in newtons?
  9. 9.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Pushing a crate 8 m took 1680 J of work. What force was used, in newtons?
  11. 11.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ Pushing a crate 10 m took 1700 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 450 N pushes a cart 4 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 210 N pushes a cart 1 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 430 N pushes a cart 1 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 500 N did 500 J of work. How many metres did the object move?
  18. 18.🏋️ 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?
  19. 19.🏋️ An 11 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.🏋️ A force of 300 N pushes a cart 1 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 320 N did 1280 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 230 N did 2300 J of work. How many metres did the object move?
  23. 23.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
  27. 27.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 100 N pushes a cart 4 m along the floor. How much work is done, in joules?
  29. 29.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  30. 30.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 170 N did 850 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 100 N pushes a cart 10 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  35. 35.🏋️ A force of 310 N pushes a cart 1 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 250 N did 500 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 4 m took 120 J of work. What force was used, in newtons?
  38. 38.🏋️ 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
  39. 39.🏋️ A force of 200 N pushes a cart 7 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 440
  2. 4320
  3. 70
  4. 8
  5. 200
  6. 5
  7. 5
  8. 460
  9. 1380
  10. 210
  11. 10
  12. 170
  13. 1800
  14. 210
  15. 430
  16. 950
  17. 1
  18. 40
  19. 330
  20. 300
  21. 4
  22. 10
  23. 500
  24. 900
  25. 300
  26. through a distance
  27. 800
  28. 400
  29. joule (J)
  30. 170
  31. 2
  32. 5
  33. 1000
  34. less effort
  35. 310
  36. 2
  37. 30
  38. no, work stays the same
  39. 1400
  40. 500

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