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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 432 · 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 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?
  2. 2.🏋️ A force of 310 N did 2790 J of work. How many metres did the object move?
  3. 3.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ Pushing a crate 9 m took 4500 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 290 N pushes a cart 2 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Pushing a crate 2 m took 500 J of work. What force was used, in newtons?
  8. 8.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  10. 10.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  11. 11.🏋️ Pushing a crate 9 m took 3060 J of work. What force was used, in newtons?
  12. 12.🏋️ Pushing a crate 2 m took 440 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 7 m took 280 J of work. What force was used, in newtons?
  14. 14.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 180 N pushes a cart 1 m along the floor. How much work is done, in joules?
  16. 16.🏋️ 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)
  17. 17.🏋️ A force of 220 N pushes a cart 8 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Pushing a crate 3 m took 960 J of work. What force was used, in newtons?
  20. 20.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
  21. 21.🏋️ A force of 140 N did 1260 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Pushing a crate 7 m took 2590 J of work. What force was used, in newtons?
  24. 24.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  25. 25.🏋️ A force of 250 N pushes a cart 3 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 50 N did 250 J of work. How many metres did the object move?
  27. 27.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 480 N did 4800 J of work. How many metres did the object move?
  29. 29.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 4 m took 600 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 150 N did 150 J of work. How many metres did the object move?
  35. 35.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 50 N pushes a cart 9 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 90 N did 630 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 490 N pushes a cart 2 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 850
  2. 9
  3. 40
  4. 500
  5. 580
  6. 3
  7. 250
  8. 1000
  9. load ÷ effort
  10. through a distance
  11. 340
  12. 220
  13. 40
  14. 1000
  15. 180
  16. 350
  17. 1760
  18. 50
  19. 320
  20. no, work stays the same
  21. 9
  22. 220
  23. 370
  24. joule (J)
  25. 750
  26. 5
  27. 6
  28. 10
  29. 3
  30. 200
  31. 200
  32. 2
  33. 150
  34. 1
  35. 2
  36. 6
  37. 450
  38. 7
  39. 980
  40. 950

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