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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 840 · 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) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  2. 2.🏋️ A force of 490 N did 4900 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 330 N pushes a cart 10 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  5. 5.🏋️ A force of 150 N pushes a cart 6 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  8. 8.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  10. 10.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A force of 330 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  15. 15.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A force of 500 N pushes a cart 1 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 290 N pushes a cart 4 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Pushing a crate 5 m took 1100 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 290 N pushes a cart 10 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 20 N did 20 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 70 N pushes a cart 4 m along the floor. How much work is done, in joules?
  28. 28.🏋️ 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?
  29. 29.🏋️ A force of 480 N pushes a cart 1 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 260 N did 1040 J of work. How many metres did the object move?
  31. 31.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 4 m took 1840 J of work. What force was used, in newtons?
  34. 34.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 280 N pushes a cart 2 m along the floor. How much work is done, in joules?
  36. 36.🏋️ 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)
  37. 37.🏋️ Pushing a crate 5 m took 1250 J of work. What force was used, in newtons?
  38. 38.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ Pushing a crate 7 m took 840 J of work. What force was used, in newtons?

Answer key

  1. no, work stays the same
  2. 10
  3. 3300
  4. less effort
  5. 900
  6. 5
  7. joule (J)
  8. 50
  9. through a distance
  10. 600
  11. 330
  12. 1000
  13. 100
  14. load ÷ effort
  15. 600
  16. 850
  17. 600
  18. 500
  19. 5
  20. 4
  21. 2
  22. 1160
  23. 220
  24. 2900
  25. 850
  26. 1
  27. 280
  28. 450
  29. 480
  30. 4
  31. 120
  32. 800
  33. 460
  34. 6
  35. 560
  36. 250
  37. 250
  38. 850
  39. 6
  40. 120

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