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soccergal12

explain whether or not a particle would have acceleration if (a) it's moving in a straight line with constant speed, and (b) moving around a curve with constant speed

  • one year ago
  • one year ago

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  1. CliffSedge
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    What does it mean for something to accelerate? What has to change?

    • one year ago
  2. soccergal12
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    velocity ?

    • one year ago
  3. MuH4hA
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    Correct. And in which of the 2 cases does the velocity change? (Remember that velocity is a vector quantity meaning you have to take into account the speed _and_ the direction)

    • one year ago
  4. sagarrobo
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    if it is moving on astright line it has no acc for constant speed if along a curve then it has centripetal acceleration toward the centre of curve

    • one year ago
  5. soccergal12
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    the velocity changes in the second case

    • one year ago
  6. sagarrobo
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    yes it changes but not he magnitude but its direction and since it is a vector quantity so if direction changes evevn if magnitude is constant then also it changes

    • one year ago
  7. soccergal12
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    so the direction changes, but magnitude doesn't? therefore, since direction changes, there's also a change in acceleration?

    • one year ago
  8. sagarrobo
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    yes definitly

    • one year ago
  9. soccergal12
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    okay, thank you!

    • one year ago
  10. chongkhengwye
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    Acceleration is the rate of change of velocity. In (a), it is possible there is an acceleration if the object suddenly moves in the opposite direction in a small time of t; i.e. a = 2*v/t In (b), for the object to move in a curve, the direction of its motion must be changing all the time, and thus its velocity changes, leading to non-zero acceleration.

    • one year ago
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