1.

(a) Define frictional force (or friction) (b) Explain why frictional force is said to be a contact force. (c) Explain why magnetic force is said to be a non-contact force.

Answer»

(a) Define frictional force (or friction)

(b) Explain why frictional force is said to be a contact force.

(c) Explain why magnetic force is said to be a non-contact force.



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