Question

Why are ski-boards that are used to glide over snow longand broad ?MSCERT Class 8th General Science Ch3 Atmospheric Pressure

Answer 1

this is ur ans

As the area over which force increases,the pressure acting on that area decreases. 
A long and broad plank , helps to increase the area over which force due to the persons weight is equally distributed. 
This reduces the pressure on the ice and makes it easier to ski as the board does not get stuck on ice. :))