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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 215 · 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.🏋️ Pushing a crate 4 m took 480 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 170 N pushes a cart 1 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
  6. 6.🏋️ A force of 450 N pushes a cart 2 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Pushing a crate 9 m took 1440 J of work. What force was used, in newtons?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  10. 10.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
  11. 11.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A force of 60 N pushes a cart 5 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 290 N pushes a cart 7 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 140 N pushes a cart 1 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 40 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 110 N did 880 J of work. How many metres did the object move?
  17. 17.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  18. 18.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ 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?
  20. 20.🏋️ Pushing a crate 7 m took 3080 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 290 N did 2030 J of work. How many metres did the object move?
  22. 22.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 30 N pushes a cart 5 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 160 N pushes a cart 6 m along the floor. How much work is done, in joules?
  25. 25.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  26. 26.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 310 N pushes a cart 3 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 9 m took 2160 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ 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?
  31. 31.🏋️ A force of 350 N did 2450 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 10 N did 10 J of work. How many metres did the object move?
  33. 33.🏋️ 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)
  34. 34.🏋️ A force of 320 N pushes a cart 3 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 2 m took 720 J of work. What force was used, in newtons?
  36. 36.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 270 N pushes a cart 3 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?

Answer key

  1. 120
  2. 170
  3. 1000
  4. 4
  5. less effort
  6. 900
  7. 650
  8. 160
  9. load ÷ effort
  10. no, work stays the same
  11. 300
  12. 300
  13. 2030
  14. 140
  15. 2
  16. 8
  17. through a distance
  18. 480
  19. 130
  20. 440
  21. 7
  22. 2
  23. 150
  24. 960
  25. joule (J)
  26. 650
  27. 930
  28. 240
  29. 2
  30. 160
  31. 7
  32. 1
  33. 300
  34. 960
  35. 360
  36. 100
  37. 2
  38. 900
  39. 810
  40. 1

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