question_answer

Two bombs of 5 kg and 10 kg are thrown from a cannon with the same velocity in the same direction, (i) Which bomb will reach the ground first? (ii) If the bombs are thrown in the same direction with different velocity, what would be the effect?

Answer:

                (i) Both the bombs will reach the ground simultaneously because the time of flight does not depend upon mass of the projectile. (ii) On throwing with different velocities, the bomb thrown with lesser velocity will reach the ground earlier. \[T=\frac{2u\sin \theta }{g}\,\,\,\,i.e.,\,\,\,T\propto u.\]