Question

does the coefficient of friction change with load how does it vary​

Answer 1

HEY!!

HERE IS YOUR ANSWER  :-

Coefficient of friction decreases with increase in normal load. This curve exhibits the change in friction coefficient with respect to change in normal load.

MARK AS BRAINLIST IF HLPED ^_^

Answer 2

1. The kinetic frictional force is smaller than the static.

2. The static frictional force can point toward the center of the circle, but the kinetic frictional force opposes the direction of motion, making it very difficult to regain control of the car and continue around the curve.