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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 993 · 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 5 m took 1550 J of work. What force was used, in newtons?
  2. 2.🏋️ Pushing a crate 7 m took 3220 J of work. What force was used, in newtons?
  3. 3.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?
  4. 4.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  5. 5.🏋️ Pushing a crate 8 m took 720 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 140 N pushes a cart 2 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A force of 30 N pushes a cart 8 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A force of 190 N did 380 J of work. How many metres did the object move?
  12. 12.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ Pushing a crate 2 m took 500 J of work. What force was used, in newtons?
  14. 14.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 390 N did 1170 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 390 N did 390 J of work. How many metres did the object move?
  17. 17.🏋️ Pushing a crate 1 m took 350 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 170 N pushes a cart 10 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ Pushing a crate 7 m took 3150 J of work. What force was used, in newtons?
  23. 23.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  24. 24.🏋️ Pushing a crate 1 m took 50 J of work. What force was used, in newtons?
  25. 25.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 170 N did 1020 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 310 N did 2480 J of work. How many metres did the object move?
  32. 32.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  33. 33.🏋️ 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?
  34. 34.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 2 m took 280 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 330 N pushes a cart 5 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Pushing a crate 4 m took 520 J of work. What force was used, in newtons?
  39. 39.🏋️ 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?
  40. 40.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance

Answer key

  1. 310
  2. 460
  3. 100
  4. load ÷ effort
  5. 90
  6. 280
  7. 30
  8. 120
  9. 240
  10. 700
  11. 2
  12. 500
  13. 250
  14. 850
  15. 3
  16. 1
  17. 350
  18. 1700
  19. 500
  20. 2
  21. 5
  22. 450
  23. joule (J)
  24. 50
  25. 550
  26. 600
  27. 350
  28. 6
  29. 6
  30. 6
  31. 8
  32. less effort
  33. 200
  34. 50
  35. 6
  36. 140
  37. 1650
  38. 130
  39. 70
  40. through a distance

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