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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 876 · 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 200 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 90 N pushes a cart 3 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 90 N pushes a cart 2 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  6. 6.🏋️ 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?
  7. 7.🏋️ 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)
  8. 8.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
  10. 10.🏋️ 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
  11. 11.🏋️ A force of 40 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A 16 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 force of 170 N pushes a cart 10 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ 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?
  17. 17.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ 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?
  19. 19.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  22. 22.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 280 N did 2520 J of work. How many metres did the object move?
  24. 24.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  25. 25.🏋️ A 14 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.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 270 N pushes a cart 7 m along the floor. How much work is done, in joules?
  29. 29.🏋️ 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)
  30. 30.🏋️ A force of 40 N did 40 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 10 m took 1300 J of work. What force was used, in newtons?
  32. 32.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 8 m took 1600 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 310 N pushes a cart 10 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 60 N did 300 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 180 N pushes a cart 4 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 90 N did 180 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 8 m took 1840 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 110 N pushes a cart 6 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 5
  2. 270
  3. 180
  4. 5
  5. through a distance
  6. 300
  7. 650
  8. 2
  9. 1500
  10. no, work stays the same
  11. 40
  12. 480
  13. 1700
  14. 2
  15. 450
  16. 30
  17. 900
  18. 160
  19. 5
  20. 130
  21. less effort
  22. 3
  23. 9
  24. joule (J)
  25. 420
  26. 900
  27. 300
  28. 1890
  29. 400
  30. 1
  31. 130
  32. 650
  33. 200
  34. 3100
  35. 5
  36. 720
  37. 2
  38. 230
  39. 660
  40. 190

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