question_answer 39)

                  A wooden block with a coin placed on it top, floats in water as shown in Fig. The distance l and h are shown in the figure. After some time the coin falls into the water. Then (a) \[l\] decrease                             (b) \[h\] decreases. (c) \[l\] increases                             (d) \[h\] increase                

Answer:

                  (a, d) When coin fall into water, up thrust on the block decreases.