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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 680 · 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 360 N did 360 J of work. How many metres did the object move?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  3. 3.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 60 N pushes a cart 7 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Pushing a crate 7 m took 420 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 80 N pushes a cart 10 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 170 N pushes a cart 1 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
  9. 9.🏋️ Pushing a crate 10 m took 3200 J of work. What force was used, in newtons?
  10. 10.🏋️ A 17 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 force of 70 N pushes a cart 5 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 50 N pushes a cart 4 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Pushing a crate 3 m took 390 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 70 N did 420 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 40 N did 360 J of work. How many metres did the object move?
  20. 20.🏋️ 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?
  21. 21.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  23. 23.🏋️ A force of 420 N pushes a cart 4 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Pushing a crate 9 m took 3240 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 130 N did 1170 J of work. How many metres did the object move?
  31. 31.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A 2 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 machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 200 N pushes a cart 10 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  39. 39.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?

Answer key

  1. 1
  2. no, work stays the same
  3. 600
  4. 420
  5. 60
  6. 800
  7. 170
  8. less effort
  9. 320
  10. 680
  11. 350
  12. 800
  13. 2
  14. 3
  15. 200
  16. 130
  17. 6
  18. 600
  19. 9
  20. 300
  21. 250
  22. through a distance
  23. 1680
  24. 2
  25. 4
  26. 5
  27. 5
  28. 360
  29. 3
  30. 9
  31. 150
  32. 20
  33. 2
  34. 2000
  35. 6
  36. 100
  37. 5
  38. joule (J)
  39. 400
  40. 4

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