[" 62.A block of mass "m" is attached to two unstretche "],[" springs of spring constants "k" ,each as shown "],[" block is displaced towards right through a distance "],[" and is displaced towards right through a distance "],[" and is released.The speed of the block as it pase,"],[" through the mean position will be "],[" rooon "],[[" (a) "x sqrt((m)/(2k))," (b) "x sqrt((2k)/(m))," (c) "x sqrt((m)/(k))," (d) "x(2k)/(m)]]