P, Q and R are three balloons ascending with velocities U, 4U and 8U respectively. If stones of the same mass be dropped from each, when they are at the same height, then

B_(1) , B_(2) , and B_(3) , are three balloos ascending with velocities v , 2v , and 3v , respectively, If a bomb is dropped from each when they are at the same height, then.

Three stones P, Q and R are projected vertically up with velocities u, 4u and 8u respectively from the top of a tower simultaneously Then (A) All stones reach the ground simultaneously (B) stone P reaches the ground first (C) stone Q reaches the ground first (D) stone R reaches the ground first

Two bodies P and Q are projected with velocites sqrt(2) u and u respectively. They cover the same horizontal distance. If body P is projected at 15^(@) will the horizontal, then calcu late the angle of projection of body Q.

The velocities of three molecules are 3u,4u and 5u, respectively. Then, rms speed will be

A body dropped from a height h with an initial speed zero, strikes the ground with a velocity 3km/h . Another body of same mass is dropped from the same height h with an initial speed -u' = 4km//h . Find the final velocity of second body with which it strikes the ground

A situation is shown in which two objects A and B start their motion from same point in same direction. The graph of their velocities against time is drawn. u_A and u_B are the initial velocities of A and B respectively. T is the time at which their velocities become equal after start of motion. You cannot use the data of one question while solving another question of the same set. So all the questions are independent of each other. 7. After 10 s of the start of motion of both objects A and B, find the value of velocity of A if u_A = 6 ms^-1 , u_B = 12 ms^-1 and at T velocity of A is 8 ms^-1 and T = 4s

A stone is dropped from a balloon ascending with v_0=2m/s , from a height h=4.8 m .Find the time of flight of the stone.