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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 493 · 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 340 N pushes a cart 10 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 240 N did 1920 J of work. How many metres did the object move?
  3. 3.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  4. 4.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  6. 6.🏋️ A force of 280 N did 1400 J of work. How many metres did the object move?
  7. 7.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  9. 9.🏋️ A force of 60 N pushes a cart 2 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 210 N did 630 J of work. How many metres did the object move?
  11. 11.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  13. 13.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 470 N did 940 J of work. How many metres did the object move?
  17. 17.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  21. 21.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 240 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 480 N pushes a cart 6 m along the floor. How much work is done, in joules?
  27. 27.🏋️ 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?
  28. 28.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 470 N did 2350 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 440 N did 3960 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 450 N did 4500 J of work. How many metres did the object move?
  34. 34.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 5 m took 1550 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 250 N pushes a cart 1 m along the floor. How much work is done, in joules?
  38. 38.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?

Answer key

  1. 3400
  2. 8
  3. joule (J)
  4. 6
  5. less effort
  6. 5
  7. 400
  8. through a distance
  9. 120
  10. 3
  11. 5
  12. no, work stays the same
  13. 50
  14. 1260
  15. 4
  16. 2
  17. 3
  18. 350
  19. 650
  20. load ÷ effort
  21. 700
  22. 300
  23. 350
  24. 150
  25. 480
  26. 2880
  27. 160
  28. 500
  29. 6
  30. 150
  31. 5
  32. 9
  33. 10
  34. 800
  35. 2
  36. 310
  37. 250
  38. 180
  39. 240
  40. 3

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