Q: A wooden block, with a coin placed on its top, floats in water as shown in figure. The distance l and h are show there. After sometime the coin falls into the water. Then
(a) l decrease and h increase
(b) l increase and h decrease
(c) both l and h increase
(d)both l and h decrease
Sol: When coin falls into water , l will decrease because block moves up and h will decrease because the coin will displace the volume of water equal to its own volume when it is in water .