A block released from rest from the top of a smooth inclined plane of inclination `45^(@)`takes time 't' to reach the bottom . The same block released from rest , from top of a rough inclined plane of same inclination , takes time '2t' to reach the bottom , coefficient of friction is :

A block released from rest from the top of a smooth inclined plane of angle of inclinatione, reaches the bottom in time t_(1) The same block, released from rest from the top of another smooth inclined plane of angle of inclination theta_(2) reaches the bottom in time ty. If the two inclined planes have the same height, the relation between t_(1) and t_(2) is :

A block released from rest from the tope of a smooth inclined plane of angle of inclination theta_(1) = 30^(@) reaches the bottom in time t_(1) . The same block, released from rest from the top of another smooth inclined plane of angle of inclination theta_(2) = 45^(@) reaches the bottom in time t_(2) . Time t_(1) and t_(2) are related as ( Assume that the initial heights of blocks in the two cases are equal ).

A block released from rest from the tope of a smooth inclined plane of angle of inclination theta_(1) = 30^(@) reaches the bottom in time t_(1) . The same block, released from rest from the top of another smooth inclined plane of angle of inclination theta_(2) = 45^(@) reaches the bottom in time t_(2) . Time t_(1) and t_(2) are related as ( Assume that the initial heights of blocks in the two cases are equal ).

A block released from rest from the top of a smooth inclined plane of angle theta_1 reaches the bottom in time t_1 . The same block released from rest from the top of another smooth inclined plane of angle theta_2 reaches the bottom in time t_2 If the two inclined planes have the same height, the relation between t_1 and t_2 is

A block released from rest from the top of a smooth inclined plane of angle theta_1 reaches the bottom in time t_1 . The same block released from rest from the top of another smooth inclined plane of angle theta_2 reaches the bottom in time t_2 If the two inclined planes have the same height, the relation between t_1 and t_2 is