A body is thrown vertically upwards with an initial velocity u. It passes a point at a height h above the ground at time t1 while going up and at time t2 while falling down. Then the relation between u, t1 and t2 is
A block of mass 'm' is suspended by different springs of spring constants shown in the figure.
Let time period of oscillation in these four positions be T1, T2, T3 and T4. Then
R = { (T1 , T2) : T1 , T2 ϵ A and T1 is congruent to T2} Then the relation R is______