Does the law of attraction actually have a basis in physics?

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

(01.02 mc) nicole pushes her bike up a hill. overhead, the sun exerts a gravitational force on earth. which statement is true about the bike and earth? they both experience contact forces. they both experience non-contact forces. the bike experiences a non-contact force and earth experiences a contact force. the bike experiences a contact force and earth experiences a non-contact force. they both experience non-contact forces.

What is the coefficient of kinetic friction μk between the block and the tabletop?