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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 188 · 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.

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  1. 1.🏋️ A force of 40 N pushes a cart 4 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ Pushing a crate 1 m took 420 J of work. What force was used, in newtons?
  4. 4.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  5. 5.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ Pushing a crate 9 m took 3600 J of work. What force was used, in newtons?
  7. 7.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A force of 450 N pushes a cart 3 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 470 N pushes a cart 2 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Pushing a crate 2 m took 940 J of work. What force was used, in newtons?
  12. 12.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  13. 13.🏋️ A force of 130 N pushes a cart 9 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  16. 16.🏋️ A force of 460 N did 4140 J of work. How many metres did the object move?
  17. 17.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  18. 18.🏋️ A 17 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ 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)
  20. 20.🏋️ A force of 180 N pushes a cart 7 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 320 N did 2560 J of work. How many metres did the object move?
  23. 23.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 10 N pushes a cart 1 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 2 m took 660 J of work. What force was used, in newtons?
  27. 27.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 330 N did 2640 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 300 N did 1500 J of work. How many metres did the object move?
  30. 30.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ Pushing a crate 3 m took 480 J of work. What force was used, in newtons?
  32. 32.🏋️ 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
  33. 33.🏋️ A force of 440 N did 4400 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 70 N pushes a cart 8 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  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 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 170 N did 1020 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 460 N pushes a cart 1 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 30 N did 90 J of work. How many metres did the object move?

Answer key

  1. 160
  2. 140
  3. 420
  4. less effort
  5. 400
  6. 400
  7. 550
  8. 650
  9. 1350
  10. 940
  11. 470
  12. joule (J)
  13. 1170
  14. 3
  15. load ÷ effort
  16. 9
  17. through a distance
  18. 680
  19. 50
  20. 1260
  21. 350
  22. 8
  23. 900
  24. 2
  25. 10
  26. 330
  27. 800
  28. 8
  29. 5
  30. 1000
  31. 160
  32. no, work stays the same
  33. 10
  34. 560
  35. 380
  36. 5
  37. 40
  38. 6
  39. 460
  40. 3

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