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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 839 · 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 smooth ramp is 18 m long and rises 3 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A force of 160 N pushes a cart 5 m along the floor. How much work is done, in joules?
  3. 3.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
  4. 4.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ Pushing a crate 5 m took 850 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 280 N pushes a cart 7 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 8 m took 3920 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 310 N pushes a cart 5 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  12. 12.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  14. 14.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 40 N pushes a cart 4 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
  23. 23.🏋️ A force of 480 N pushes a cart 10 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 70 N pushes a cart 6 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 7 m took 2590 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 210 N did 420 J of work. How many metres did the object move?
  28. 28.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A force of 470 N did 2350 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 20 N did 200 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 480 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ 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?
  33. 33.🏋️ Pushing a crate 4 m took 1200 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 170 N did 1700 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 70 N pushes a cart 7 m along the floor. How much work is done, in joules?
  36. 36.🏋️ 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?
  37. 37.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 330 N did 2640 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 280 N did 560 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 390 N pushes a cart 1 m along the floor. How much work is done, in joules?

Answer key

  1. 950
  2. 800
  3. joule (J)
  4. 950
  5. 3
  6. 160
  7. 170
  8. 1960
  9. 490
  10. 1550
  11. no, work stays the same
  12. 2
  13. less effort
  14. 500
  15. 3
  16. 160
  17. 600
  18. 50
  19. 500
  20. 2
  21. 4
  22. through a distance
  23. 4800
  24. 150
  25. 420
  26. 370
  27. 2
  28. 10
  29. 5
  30. 10
  31. 960
  32. 130
  33. 300
  34. 10
  35. 490
  36. 120
  37. 900
  38. 8
  39. 2
  40. 390

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