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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 247 · 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 190 N did 1520 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 370 N did 1110 J of work. How many metres did the object move?
  3. 3.🏋️ Pushing a crate 10 m took 2800 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 160 N did 1600 J of work. How many metres did the object move?
  5. 5.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 410 N pushes a cart 7 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 130 N pushes a cart 9 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 430 N did 3010 J of work. How many metres did the object move?
  9. 9.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 3 m took 150 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 110 N pushes a cart 10 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 150 N pushes a cart 10 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  16. 16.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ Pushing a crate 3 m took 90 J of work. What force was used, in newtons?
  21. 21.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 500 N did 5000 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 1 m took 400 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 2 m took 900 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ Pushing a crate 1 m took 380 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 20 N pushes a cart 5 m along the floor. How much work is done, in joules?
  30. 30.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  31. 31.🏋️ Pushing a crate 10 m took 3600 J of work. What force was used, in newtons?
  32. 32.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 210 N pushes a cart 3 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 290 N did 1160 J of work. How many metres did the object move?
  40. 40.🏋️ A 16 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. 8
  2. 3
  3. 280
  4. 10
  5. 250
  6. 2870
  7. 1170
  8. 7
  9. 3
  10. 50
  11. 3
  12. 1100
  13. 1500
  14. 100
  15. no, work stays the same
  16. 720
  17. 1500
  18. 600
  19. 450
  20. 30
  21. 450
  22. 650
  23. 10
  24. 400
  25. 450
  26. 900
  27. 540
  28. 380
  29. 100
  30. joule (J)
  31. 360
  32. 3
  33. 110
  34. 900
  35. 1000
  36. 5
  37. 630
  38. 1000
  39. 4
  40. 640

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