anonymous
  • anonymous
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
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
What does it mean for something to accelerate? What has to change?
anonymous
  • anonymous
velocity ?
anonymous
  • anonymous
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)

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anonymous
  • anonymous
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
anonymous
  • anonymous
the velocity changes in the second case
anonymous
  • anonymous
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
anonymous
  • anonymous
so the direction changes, but magnitude doesn't? therefore, since direction changes, there's also a change in acceleration?
anonymous
  • anonymous
yes definitly
anonymous
  • anonymous
okay, thank you!
anonymous
  • anonymous
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.

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