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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 620 · 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 1 m took 470 J of work. What force was used, in newtons?
  2. 2.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  4. 4.🏋️ A force of 430 N did 4300 J of work. How many metres did the object move?
  5. 5.🏋️ Pushing a crate 9 m took 2340 J of work. What force was used, in newtons?
  6. 6.🏋️ Pushing a crate 7 m took 3010 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 130 N did 390 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 10 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 8 m took 880 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 70 N did 560 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 10 m took 4200 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 80 N did 800 J of work. How many metres did the object move?
  13. 13.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 230 N pushes a cart 1 m along the floor. How much work is done, in joules?
  15. 15.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  16. 16.🏋️ 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?
  17. 17.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  18. 18.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  19. 19.🏋️ A force of 210 N pushes a cart 7 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 340 N did 340 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 240 N pushes a cart 5 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 130 N pushes a cart 4 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 9 m took 900 J of work. What force was used, in newtons?
  29. 29.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 480 N did 4320 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 400 N pushes a cart 8 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 8 m took 2800 J of work. What force was used, in newtons?
  34. 34.🏋️ A 17 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 machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  37. 37.🏋️ A force of 350 N did 2450 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ 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?

Answer key

  1. 470
  2. 3
  3. less effort
  4. 10
  5. 260
  6. 430
  7. 3
  8. 20
  9. 110
  10. 8
  11. 420
  12. 10
  13. 250
  14. 230
  15. joule (J)
  16. 850
  17. through a distance
  18. no, work stays the same
  19. 1470
  20. 450
  21. 1
  22. 1200
  23. 10
  24. 2
  25. 520
  26. 4
  27. 900
  28. 100
  29. 650
  30. 300
  31. 9
  32. 3200
  33. 350
  34. 680
  35. 6
  36. load ÷ effort
  37. 7
  38. 2
  39. 850
  40. 150

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