Two identical masses ,one is thrown upwards with velocity 20m/s & another is just dropped simultaneously from a height 20m.The masses collides in air & stick together. after how much time the combined mass will fall to the ground (calculate the time from the starting when motion was started)? a)2.414b)2*1.414c)3.414d)non of theseTo what max. height from ground will the combined mass rise?a)25mb)18mc)15md)20m If the collision between them is elastic,find the time interval between their striking with ground?a)0b)2sc)1sd)4s

abhinav , 7 Years ago

Grade 11