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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 393 · 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 110 N did 330 J of work. How many metres did the object move?
  2. 2.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A force of 100 N pushes a cart 10 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  5. 5.🏋️ A force of 470 N pushes a cart 1 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ 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?
  9. 9.🏋️ Pushing a crate 6 m took 2940 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 20 N pushes a cart 10 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Pushing a crate 5 m took 2050 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 460 N did 3220 J of work. How many metres did the object move?
  13. 13.🏋️ Pushing a crate 9 m took 1890 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  16. 16.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ Pushing a crate 2 m took 940 J of work. What force was used, in newtons?
  20. 20.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  21. 21.🏋️ A force of 460 N did 2760 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 380 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 360 N pushes a cart 5 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 230 N did 1150 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 340 N pushes a cart 8 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 450 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 170 N pushes a cart 3 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 250 N pushes a cart 1 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ Pushing a crate 4 m took 1880 J of work. What force was used, in newtons?
  34. 34.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  35. 35.🏋️ A force of 40 N did 200 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 360 N pushes a cart 2 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ 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)
  39. 39.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  40. 40.🏋️ A force of 100 N pushes a cart 5 m along the floor. How much work is done, in joules?

Answer key

  1. 3
  2. 850
  3. 1000
  4. no, work stays the same
  5. 470
  6. 700
  7. 50
  8. 680
  9. 490
  10. 200
  11. 410
  12. 7
  13. 210
  14. 390
  15. through a distance
  16. 60
  17. 2
  18. 1000
  19. 470
  20. less effort
  21. 6
  22. 1140
  23. 1800
  24. 5
  25. 2720
  26. 1000
  27. 450
  28. 510
  29. 6
  30. 250
  31. 700
  32. 80
  33. 470
  34. joule (J)
  35. 5
  36. 720
  37. 5
  38. 650
  39. load ÷ effort
  40. 500

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