Evaluate the truthfulness of the following statements:
S1: Friction can both facilitate and hinder movement.
S2: Frictional force is independent of the nature of the surfaces in contact.
S3: Friction is necessary for activities such as walking and driving.
1
S1 & S2 are true, S3 is false
2
S1 & S3 are true, S2 is false
3
S2 & S3 are true, S1 is false
4
All statements are true