A car starts at rest and travels east. After 3 seconds its velocity is 12 m/s east. What is the car's initial velocity?*
0 m/s
36 m/s east
12 m/s east
O 3s
O 4 m/s east

Cpowerlifting my boi

Answer(a)   the matererials that are in contact, the two materials and the nature of their surfaces/// (b)/// the force pushing the two surfaces together, pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other

The answer is periosteum