Q.. A square plate of edge d and a circular dise of diameter d are placed touching each other at the midpoint of an edge of the plate as shown in figure (9-Q2). Locate the centre of mass of the combination, assuming same mass per unit area for the two plates.

 

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Link;-->A ball is dropped from a height of 5 m onto a sandy floor and penetrates the sand up to 10 cm before coming to rest. Find the retardation of the ball in sand assuming it to be uniform.

Link;;-->A ball is projected vertically upward with a speed of 50 m/s. Find (a) the maximum height, (b) the time to reach the maximum height, (c) the speed at half the maximum height. Take g = 10 m/s².

Link::-->https://4iit.blogspot.com/2021/07/a-ball-is-projected-vertically-upward.html?m=1

Link;;--->https://4iit.blogspot.com/2021/09/7-if-be-roots-of-equation-x-2-5-ix18i.html?m=1