Final answer:
To have good traction on hard-packed snow, winter tires with a softer rubber compound and deeper tread patterns are needed to increase friction. In basketball, more friction is also desirable for players' shoes to prevent slipping and provide better stability on the court.
Step-by-step explanation:
To get good traction on hard-packed snow, you should choose tires that are designed for winter conditions, often called 'winter tires' or 'snow tires'. These tires are made of a softer rubber compound and feature deeper tread patterns to provide more grip and friction in cold and snowy environments.
An example where more friction is desirable is when playing basketball. Players need shoes with a good grip to prevent slipping on the court. The soles of basketball shoes are designed with patterns that increase friction, provide stability, and allow for quick pivots and movements.