A wooden block with a coin placed on its top, floats in water as shown infigure . The distance L and H are shown in the figure .after sometime the coin falls into the water , then

A wooden block with a coin placed on its top, floats in water as shown

1.	A wooden block with a coin placed on its top, floats in water as shown infigure . The distance L and H are shown in the figure .after sometime the coin falls into the water , then
Answer» L decreases h decreases L increases h increases Solution :When a body floats on liquid ,then upward force is balanced by its weight ACTING downward. When the coin falls into water ,weight of the (block +coin)system decreases and upward force ALSO decreases . If L decreases , upward force also decreases , HENCE L decreases . (Option A) As l decreases volume of water decreases , hence h decreases . (Option B) Note : When coin falls in water it is DISPLACED by a volumeof water which is very small so it cannot be TAKEN into consideration .