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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 382 · 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 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?
  2. 2.🏋️ Pushing a crate 6 m took 2940 J of work. What force was used, in newtons?
  3. 3.🏋️ 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?
  4. 4.🏋️ A force of 280 N did 2240 J of work. How many metres did the object move?
  5. 5.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
  7. 7.🏋️ A force of 50 N pushes a cart 7 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ Pushing a crate 10 m took 5000 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 30 N pushes a cart 2 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
  13. 13.🏋️ 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)
  14. 14.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 300 N pushes a cart 8 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 140 N pushes a cart 7 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ Pushing a crate 3 m took 30 J of work. What force was used, in newtons?
  20. 20.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Pushing a crate 5 m took 600 J of work. What force was used, in newtons?
  22. 22.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 110 N pushes a cart 4 m along the floor. How much work is done, in joules?
  26. 26.🏋️ 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?
  27. 27.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 7 m took 2240 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 280 N pushes a cart 5 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Pushing a crate 8 m took 3360 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 350 N did 2450 J of work. How many metres did the object move?
  33. 33.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  36. 36.🏋️ Pushing a crate 3 m took 450 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 340 N pushes a cart 9 m along the floor. How much work is done, in joules?
  40. 40.🏋️ 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?

Answer key

  1. 120
  2. 490
  3. 180
  4. 8
  5. 500
  6. no, work stays the same
  7. 350
  8. 2
  9. 900
  10. 500
  11. 60
  12. through a distance
  13. 900
  14. 5
  15. 2400
  16. 980
  17. 3
  18. 360
  19. 10
  20. 150
  21. 120
  22. 2
  23. 80
  24. 3
  25. 440
  26. 130
  27. 800
  28. 6
  29. 320
  30. 1400
  31. 420
  32. 7
  33. 180
  34. 360
  35. joule (J)
  36. 150
  37. 2
  38. 700
  39. 3060
  40. 400

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