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soccergal12
Group Title
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
soccergal12 Group Title
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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CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
What does it mean for something to accelerate? What has to change?
 one year ago

soccergal12 Group TitleBest ResponseYou've already chosen the best response.0
velocity ?
 one year ago

MuH4hA Group TitleBest ResponseYou've already chosen the best response.0
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

sagarrobo Group TitleBest ResponseYou've already chosen the best response.1
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

soccergal12 Group TitleBest ResponseYou've already chosen the best response.0
the velocity changes in the second case
 one year ago

sagarrobo Group TitleBest ResponseYou've already chosen the best response.1
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

soccergal12 Group TitleBest ResponseYou've already chosen the best response.0
so the direction changes, but magnitude doesn't? therefore, since direction changes, there's also a change in acceleration?
 one year ago

sagarrobo Group TitleBest ResponseYou've already chosen the best response.1
yes definitly
 one year ago

soccergal12 Group TitleBest ResponseYou've already chosen the best response.0
okay, thank you!
 one year ago

chongkhengwye Group TitleBest ResponseYou've already chosen the best response.0
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 nonzero acceleration.
 one year ago
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