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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 246 · 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 machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ Pushing a crate 5 m took 2000 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 200 N pushes a cart 4 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  5. 5.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 5 m took 1550 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 180 N did 360 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 30 N pushes a cart 7 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 340 N pushes a cart 5 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ 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?
  16. 16.🏋️ A force of 90 N pushes a cart 5 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Pushing a crate 10 m took 3900 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 20 N did 100 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 240 N did 2160 J of work. How many metres did the object move?
  20. 20.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 410 N did 1640 J of work. How many metres did the object move?
  22. 22.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 170 N did 510 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 240 N pushes a cart 7 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 370 N did 2220 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  30. 30.🏋️ Pushing a crate 5 m took 2150 J of work. What force was used, in newtons?
  31. 31.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 80 N did 800 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 190 N did 1330 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 160 N did 480 J of work. How many metres did the object move?
  35. 35.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  36. 36.🏋️ A force of 460 N pushes a cart 9 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 390 N did 2730 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 3 m took 660 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 10 N did 90 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 380 N did 380 J of work. How many metres did the object move?

Answer key

  1. 4
  2. 400
  3. 800
  4. less effort
  5. 600
  6. 70
  7. 200
  8. 6
  9. 2
  10. 310
  11. 2
  12. 210
  13. 1700
  14. 1000
  15. 150
  16. 450
  17. 390
  18. 5
  19. 9
  20. 200
  21. 4
  22. 3
  23. 3
  24. 1680
  25. 6
  26. 2
  27. 950
  28. 6
  29. joule (J)
  30. 430
  31. 500
  32. 10
  33. 7
  34. 3
  35. through a distance
  36. 4140
  37. 7
  38. 220
  39. 9
  40. 1

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