A point starts moving in a straight line with a certain acceleration. At a time t after beginning of motion the acceleration suddenly becomes retardation of the same value.The time in which the point returns to the initial point is: 1) root2 t 2) (2 + root2) t 3) t/(root2) 4) Cannot be predicted

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DR STRANGE · Answer

the ans is 1) root2 t s= ut + at 2 /2 let acceleration a = p initially the velocity 0 distance d travelled in time t d=pt 2 /2............(distance travelled in time t) after time t acceleration becomes retardation i.e. a = -p it will travel same distance d before its veloity becomes due to retardation. therefore distance travelled is d+d= 2d now the particle will retrace the path backward again s= ut + at 2 /2 2d = 0t + pt’ 2 /2 2pt 2 /2 = 0t + pt’ 2 /2 t’ = root2 t Approve if you are satisfied :)

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A point starts moving in a straight line with a certain acceleration. At a time t after beginning of motion the acceleration suddenly becomes retardation of the same value.The time in which the point returns to the initial point is: 1) root2 t 2) (2 + root2) t 3) t/(root2) 4) Cannot be predicted

A point starts moving in a straight line with a certain acceleration. At a time t after beginning of motion the acceleration suddenly becomes retardation of the same value.The time in which the point returns to the initial point is:

1) root2 t 2) (2 + root2) t 3) t/(root2) 4) Cannot be predicted

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A point starts moving in a straight line with a certain acceleration. At a time t after beginning of motion the acceleration suddenly becomes retardation of the same value.The time in which the point returns to the initial point is: 1) root2 t 2) (2 + root2) t 3) t/(root2) 4) Cannot be predicted

A point starts moving in a straight line with a certain acceleration. At a time t after beginning of motion the acceleration suddenly becomes retardation of the same value.The time in which the point returns to the initial point is: 1) root2 t 2) (2 + root2) t 3) t/(root2) 4) Cannot be predicted

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A point starts moving in a straight line with a certain acceleration. At a time t after beginning of motion the acceleration suddenly becomes retardation of the same value.The time in which the point returns to the initial point is:

1) root2 t 2) (2 + root2) t 3) t/(root2) 4) Cannot be predicted