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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 532 · 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 410 N pushes a cart 5 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, by half (d) yes, always
  4. 4.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  5. 5.🏋️ A force of 50 N pushes a cart 1 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Pushing a crate 2 m took 740 J of work. What force was used, in newtons?
  7. 7.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 70 N did 280 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 350 N pushes a cart 1 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 500 N did 4000 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 5 m took 2050 J of work. What force was used, in newtons?
  12. 12.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A force of 150 N pushes a cart 10 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 1 m took 50 J of work. What force was used, in newtons?
  15. 15.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 480 N pushes a cart 4 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ 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?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 330 N pushes a cart 10 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  29. 29.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 340 N did 2720 J of work. How many metres did the object move?
  31. 31.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 290 N did 290 J of work. How many metres did the object move?
  33. 33.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 370 N did 740 J of work. How many metres did the object move?
  35. 35.🏋️ 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)
  36. 36.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  37. 37.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 430 N pushes a cart 6 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 2050
  2. 250
  3. no, work stays the same
  4. through a distance
  5. 50
  6. 370
  7. 2
  8. 4
  9. 350
  10. 8
  11. 410
  12. 640
  13. 1500
  14. 50
  15. 3
  16. 6
  17. 4
  18. 5
  19. 1920
  20. 510
  21. 680
  22. 150
  23. 2
  24. 3
  25. 3300
  26. 30
  27. 950
  28. load ÷ effort
  29. 3
  30. 8
  31. 3
  32. 1
  33. 4
  34. 2
  35. 500
  36. joule (J)
  37. 4
  38. 2580
  39. 450
  40. 120

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