An object which is given an initial velocity and moves freely in space under the influence of gravit

Question

An object which is given an initial velocity and moves freely in space under the influence of gravity, is called a projectile. In projectile motion, both the magnitude and direction of acceleration remain constant. Let a cricket ball be thrown in air at a speed of $28 \mathrm{~m} / \mathrm{s}$ in a direction $30^{\circ}$ above the horizontal. \ The time taken by the ball to return to the same level from where it is projected, is

Professor PC Thomas Classes · Answer

(a) : The time taken to return to the same level is $T_f=\left(2 v_0 \sin 	hetaight) / g=\left(2 	imes 28 	imes \sin 30^{\circ}ight) / 9.8=2.9 \mathrm{~s}$