Q: When walking on ice , why it is better to take short steps ?
Sol: Ice is almost frictionless . While walking there must be sufficient friction to prevent slipping of feet . Frictional force depends on the normal reaction and normal reaction depends on the inclination of the reaction of ground to the vertical . If we take long steps the inclination of the reaction of ground to the vertical becomes large and hence frictional force is less . If we take short steps , the reaction remains close to vertical . This helps to develop more frictional force on a slippery road and makes walking possible . This is why while walking on ice it is better to take short steps .