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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 264 · 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 3 m took 1140 J of work. What force was used, in newtons?
  2. 2.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  4. 4.🏋️ A force of 310 N did 2170 J of work. How many metres did the object move?
  5. 5.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Pushing a crate 9 m took 1350 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 70 N did 700 J of work. How many metres did the object move?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  12. 12.🏋️ Pushing a crate 5 m took 1350 J of work. What force was used, in newtons?
  13. 13.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  14. 14.🏋️ 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?
  15. 15.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  16. 16.🏋️ A force of 480 N did 2400 J of work. How many metres did the object move?
  17. 17.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 40 N did 200 J of work. How many metres did the object move?
  19. 19.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 300 N did 600 J of work. How many metres did the object move?
  23. 23.🏋️ Pushing a crate 9 m took 1440 J of work. What force was used, in newtons?
  24. 24.🏋️ 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)
  25. 25.🏋️ A force of 50 N pushes a cart 5 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 190 N did 570 J of work. How many metres did the object move?
  27. 27.🏋️ 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?
  28. 28.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ 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)
  31. 31.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 40 N did 120 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 350 N pushes a cart 4 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 140 N pushes a cart 4 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 400 N pushes a cart 9 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Pushing a crate 1 m took 450 J of work. What force was used, in newtons?
  37. 37.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
  38. 38.🏋️ A force of 290 N did 1740 J of work. How many metres did the object move?
  39. 39.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ Pushing a crate 3 m took 1500 J of work. What force was used, in newtons?

Answer key

  1. 380
  2. 950
  3. less effort
  4. 7
  5. 180
  6. 4
  7. 150
  8. 10
  9. 400
  10. 3
  11. load ÷ effort
  12. 270
  13. no, work stays the same
  14. 160
  15. joule (J)
  16. 5
  17. 400
  18. 5
  19. 250
  20. 3
  21. 2
  22. 2
  23. 160
  24. 200
  25. 250
  26. 3
  27. 120
  28. 3
  29. 900
  30. 50
  31. 400
  32. 3
  33. 1400
  34. 560
  35. 3600
  36. 450
  37. through a distance
  38. 6
  39. 450
  40. 500

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