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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 938 · 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 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ Pushing a crate 7 m took 770 J of work. What force was used, in newtons?
  3. 3.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ 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?
  5. 5.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 170 N did 1190 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 90 N pushes a cart 10 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 300 N pushes a cart 3 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  11. 11.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  13. 13.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 280 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ Pushing a crate 2 m took 700 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 1 m took 250 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 80 N did 160 J of work. How many metres did the object move?
  20. 20.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
  21. 21.🏋️ A force of 80 N pushes a cart 9 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 90 N pushes a cart 8 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 90 N did 810 J of work. How many metres did the object move?
  27. 27.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 10 N pushes a cart 4 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 150 N pushes a cart 8 m along the floor. How much work is done, in joules?
  34. 34.🏋️ 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?
  35. 35.🏋️ A force of 410 N did 2050 J of work. How many metres did the object move?
  36. 36.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ Pushing a crate 3 m took 450 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 240 N pushes a cart 5 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 50 N pushes a cart 8 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 100
  2. 110
  3. 1000
  4. 350
  5. 5
  6. 7
  7. 900
  8. 4
  9. 900
  10. no, work stays the same
  11. 100
  12. through a distance
  13. 2
  14. 2
  15. 560
  16. 40
  17. 350
  18. 250
  19. 2
  20. less effort
  21. 720
  22. 720
  23. 1000
  24. 200
  25. 850
  26. 9
  27. 700
  28. 6
  29. 40
  30. 200
  31. 6
  32. 550
  33. 1200
  34. 130
  35. 5
  36. 150
  37. 150
  38. 1200
  39. 400
  40. 250

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