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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 845 · 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.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ Pushing a crate 4 m took 1000 J of work. What force was used, in newtons?
  3. 3.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  5. 5.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 230 N pushes a cart 9 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
  8. 8.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 430 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 80 N did 160 J of work. How many metres did the object move?
  12. 12.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 40 N did 200 J of work. How many metres did the object move?
  15. 15.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ Pushing a crate 4 m took 400 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 320 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 130 N did 1040 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 2 m took 100 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  23. 23.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ 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?
  28. 28.🏋️ A force of 320 N pushes a cart 9 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  30. 30.🏋️ A force of 110 N did 1100 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 120 N pushes a cart 7 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 500 N did 2500 J of work. How many metres did the object move?
  36. 36.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  39. 39.🏋️ Pushing a crate 7 m took 2870 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 50 N pushes a cart 10 m along the floor. How much work is done, in joules?

Answer key

  1. 110
  2. 250
  3. 2
  4. through a distance
  5. 300
  6. 2070
  7. no, work stays the same
  8. 3
  9. 850
  10. 2580
  11. 2
  12. 570
  13. 30
  14. 5
  15. 3
  16. 100
  17. 640
  18. 8
  19. 50
  20. 6
  21. 1260
  22. load ÷ effort
  23. 850
  24. 4
  25. 850
  26. 250
  27. 150
  28. 2880
  29. less effort
  30. 10
  31. 1500
  32. 840
  33. 300
  34. 560
  35. 5
  36. 950
  37. 2
  38. joule (J)
  39. 410
  40. 500

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