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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 413 · 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 290 N did 580 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 90 N did 900 J of work. How many metres did the object move?
  3. 3.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  4. 4.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ Pushing a crate 9 m took 990 J of work. What force was used, in newtons?
  6. 6.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 30 N did 120 J of work. How many metres did the object move?
  9. 9.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  10. 10.🏋️ A force of 170 N pushes a cart 2 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 310 N pushes a cart 3 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  17. 17.🏋️ 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)
  18. 18.🏋️ Pushing a crate 6 m took 2580 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?
  20. 20.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ 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?
  24. 24.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  25. 25.🏋️ A force of 490 N did 4900 J of work. How many metres did the object move?
  26. 26.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 290 N pushes a cart 4 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 500 N pushes a cart 4 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 7 m took 1820 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 5 m took 1500 J of work. What force was used, in newtons?
  33. 33.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Pushing a crate 7 m took 2940 J of work. What force was used, in newtons?
  35. 35.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  36. 36.🏋️ Pushing a crate 4 m took 1120 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ 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?
  39. 39.🏋️ A force of 120 N pushes a cart 7 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 40 N did 360 J of work. How many metres did the object move?

Answer key

  1. 2
  2. 10
  3. 90
  4. 850
  5. 110
  6. 3
  7. 500
  8. 4
  9. through a distance
  10. 340
  11. 930
  12. 1290
  13. 800
  14. 950
  15. 160
  16. less effort
  17. 450
  18. 430
  19. 1
  20. 700
  21. 6
  22. 850
  23. 120
  24. no, work stays the same
  25. 10
  26. 800
  27. 1160
  28. 2000
  29. 550
  30. 5
  31. 260
  32. 300
  33. 2
  34. 420
  35. joule (J)
  36. 280
  37. 6
  38. 540
  39. 840
  40. 9

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