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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 50 · 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 force of 100 N pushes a cart 9 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Pushing a crate 7 m took 70 J of work. What force was used, in newtons?
  3. 3.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 210 N pushes a cart 6 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  9. 9.🏋️ A force of 390 N did 1170 J of work. How many metres did the object move?
  10. 10.🏋️ 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)
  11. 11.🏋️ A force of 190 N pushes a cart 7 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 400 N pushes a cart 2 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Pushing a crate 6 m took 180 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 8 m took 2320 J of work. What force was used, in newtons?
  16. 16.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Pushing a crate 4 m took 520 J of work. What force was used, in newtons?
  18. 18.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) metre (m) (d) watt hour
  19. 19.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  20. 20.🏋️ A force of 150 N pushes a cart 8 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 60 N did 180 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 210 N did 1680 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 3 m took 30 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 8 m took 3200 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
  27. 27.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  28. 28.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 1 m took 370 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 260 N did 260 J of work. How many metres did the object move?
  31. 31.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 490 N did 980 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 6 m took 1500 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 110 N did 1100 J of work. How many metres did the object move?
  35. 35.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 30 N pushes a cart 2 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 340 N did 3400 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 3 m took 690 J of work. What force was used, in newtons?
  39. 39.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A force of 370 N pushes a cart 4 m along the floor. How much work is done, in joules?

Answer key

  1. 900
  2. 10
  3. 300
  4. 650
  5. 1260
  6. 2
  7. 4
  8. no, work stays the same
  9. 3
  10. 700
  11. 1330
  12. 800
  13. 100
  14. 30
  15. 290
  16. 250
  17. 130
  18. joule (J)
  19. load ÷ effort
  20. 1200
  21. 600
  22. 3
  23. 8
  24. 10
  25. 400
  26. 120
  27. through a distance
  28. 4
  29. 370
  30. 1
  31. 4
  32. 2
  33. 250
  34. 10
  35. 300
  36. 60
  37. 10
  38. 230
  39. 140
  40. 1480

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