Final answer:
When driving on snowy roads, sudden steering changes, sudden braking, and sudden acceleration should be avoided as these actions can reduce tire traction and lead to loss of control. More friction between tires and road surface is crucial for maintaining control of the vehicle in winter conditions.
Step-by-step explanation:
If you have to drive on roads covered in snow, you should avoid sudden steering changes, sudden braking, and sudden acceleration. These actions can lead to loss of vehicle control, as they reduce the traction between the tires and the snowy surface. In the context of winter driving, more friction between the tires and the road is desirable to maintain control of the vehicle, just like winter tires create more friction than summer tires. When considering safe driving in winter conditions, it's also important to note that oil and gasoline leaks on the road can make it even more slippery during a light rain, while a heavier rain might wash away some of those substances, potentially offering slightly better control.
Two other examples where more friction is desirable are: a person standing up from a seated position and a car accelerating while driving. Friction is a necessary force that provides the traction needed for movement and control in these situations.