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A-graph-of-x-versus-t-is-shown-in-Figure-Choose-correct-alternatives-from-below-a-The-particle-was-released-from-rest-at-t-0-b-At-B-the-acceleration-a-gt-0-c-At-C-the-velocity-and-the-ac




Question Number 20936 by Tinkutara last updated on 08/Sep/17
A graph of x versus t is shown in Figure.  Choose correct alternatives from below.  (a) The particle was released from  rest at t = 0  (b) At B, the acceleration a > 0  (c) At C, the velocity and the  acceleration vanish  (d) Average velocity for the motion  between A and D is positive  (e) The speed at D exceeds that at E.
AgraphofxversustisshowninFigure.Choosecorrectalternativesfrombelow.(a)Theparticlewasreleasedfromrestatt=0(b)AtB,theaccelerationa>0(c)AtC,thevelocityandtheaccelerationvanish(d)AveragevelocityforthemotionbetweenAandDispositive(e)ThespeedatDexceedsthatatE.
Commented by Tinkutara last updated on 08/Sep/17
Answered by ajfour last updated on 09/Sep/17
(a), (c), (e)
(a),(c),(e)
Commented by Tinkutara last updated on 09/Sep/17
Thank you very much Sir!
ThankyouverymuchSir!
Commented by ajfour last updated on 09/Sep/17
if the graph of x-t changes from  convex to concave or vice-versa  acceleration is zero there, and  if tangent to it is hrizontal then  velocity is zero. At C both the  conditions seem fulfilled. Speed or  magnitude of slope(velocity)  at D   is more than at E.
ifthegraphofxtchangesfromconvextoconcaveorviceversaaccelerationiszerothere,andiftangenttoitishrizontalthenvelocityiszero.AtCboththeconditionsseemfulfilled.Speedormagnitudeofslope(velocity)atDismorethanatE.

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