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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 639 · 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 smooth ramp is 4 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
  3. 3.🏋️ A force of 140 N pushes a cart 2 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 100 N did 900 J of work. How many metres did the object move?
  5. 5.🏋️ Pushing a crate 1 m took 140 J of work. What force was used, in newtons?
  6. 6.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 210 N did 1470 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 390 N pushes a cart 3 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Pushing a crate 6 m took 2760 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 500 N pushes a cart 5 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 10 m took 2700 J of work. What force was used, in newtons?
  15. 15.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  16. 16.🏋️ A force of 450 N pushes a cart 4 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Pushing a crate 2 m took 160 J of work. What force was used, in newtons?
  18. 18.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 250 N did 750 J of work. How many metres did the object move?
  21. 21.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ 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)
  23. 23.🏋️ A force of 390 N did 2340 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 10 m took 2300 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 10 m took 500 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 350 N pushes a cart 4 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 110 N did 550 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 7 m took 1960 J of work. What force was used, in newtons?
  31. 31.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  32. 32.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ An 18 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 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?
  36. 36.🏋️ A force of 460 N pushes a cart 7 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 70 N did 70 J of work. How many metres did the object move?
  38. 38.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 150 N pushes a cart 2 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 7 m took 2380 J of work. What force was used, in newtons?

Answer key

  1. 100
  2. less effort
  3. 280
  4. 9
  5. 140
  6. 2
  7. 7
  8. 3
  9. 1170
  10. 460
  11. 2
  12. 850
  13. 2500
  14. 270
  15. joule (J)
  16. 1800
  17. 80
  18. 50
  19. 2
  20. 3
  21. 240
  22. 1000
  23. 6
  24. 230
  25. 50
  26. 550
  27. 650
  28. 1400
  29. 5
  30. 280
  31. through a distance
  32. 150
  33. 400
  34. 720
  35. 150
  36. 3220
  37. 1
  38. 850
  39. 300
  40. 340

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