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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 376 · 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.🏋️ Pushing a crate 6 m took 300 J of work. What force was used, in newtons?
  2. 2.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  3. 3.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
  4. 4.🏋️ 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?
  5. 5.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  6. 6.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  7. 7.🏋️ A force of 320 N did 1600 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 260 N pushes a cart 3 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Pushing a crate 1 m took 70 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 9 m took 4140 J of work. What force was used, in newtons?
  19. 19.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  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 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 110 N pushes a cart 5 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 280 N did 840 J of work. How many metres did the object move?
  25. 25.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ 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)
  28. 28.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ Pushing a crate 6 m took 1200 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 170 N pushes a cart 2 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 430 N pushes a cart 1 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 30 N did 150 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 1 m took 10 J of work. What force was used, in newtons?
  34. 34.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 190 N did 1520 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 9 m took 2700 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 2 m took 820 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 450 N did 450 J of work. How many metres did the object move?
  39. 39.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 50
  2. joule (J)
  3. less effort
  4. 570
  5. through a distance
  6. no, work stays the same
  7. 5
  8. 3
  9. 6
  10. 50
  11. 750
  12. 780
  13. 150
  14. 6
  15. 600
  16. 4
  17. 70
  18. 460
  19. 760
  20. 6
  21. 240
  22. 750
  23. 550
  24. 3
  25. 100
  26. 320
  27. 500
  28. 450
  29. 200
  30. 340
  31. 430
  32. 5
  33. 10
  34. 6
  35. 8
  36. 300
  37. 410
  38. 1
  39. 950
  40. 950

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