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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 887 · 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.

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  1. 1.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
  2. 2.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ 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?
  4. 4.🏋️ 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)
  5. 5.🏋️ Pushing a crate 4 m took 880 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 10 N pushes a cart 8 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  10. 10.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 170 N pushes a cart 8 m along the floor. 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 force of 300 N pushes a cart 6 m along the floor. How much work is done, in joules?
  15. 15.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
  16. 16.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A 9 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  20. 20.🏋️ Pushing a crate 5 m took 1450 J of work. What force was used, in newtons?
  21. 21.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 200 N pushes a cart 7 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 360 N pushes a cart 1 m along the floor. How much work is done, in joules?
  24. 24.🏋️ 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)
  25. 25.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ An 11 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.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  28. 28.🏋️ A force of 240 N pushes a cart 9 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 6 m took 2340 J of work. What force was used, in newtons?
  30. 30.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ 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)
  34. 34.🏋️ A force of 330 N pushes a cart 7 m along the floor. How much work is done, in joules?
  35. 35.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 380 N pushes a cart 10 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 60 N did 360 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 20 N pushes a cart 6 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?

Answer key

  1. less effort
  2. 1000
  3. 30
  4. 850
  5. 220
  6. 80
  7. 2
  8. 100
  9. load ÷ effort
  10. 650
  11. 3
  12. 1360
  13. 250
  14. 1800
  15. joule (J)
  16. 450
  17. 450
  18. 540
  19. through a distance
  20. 290
  21. 100
  22. 1400
  23. 360
  24. 1000
  25. 40
  26. 220
  27. no, work stays the same
  28. 2160
  29. 390
  30. 150
  31. 2
  32. 100
  33. 550
  34. 2310
  35. 900
  36. 3800
  37. 6
  38. 120
  39. 700
  40. 2

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