Police lieutenants, examining the scene of an accident involving two cars, measure the skid marks of one of the cars, which nearly came to a stop before colliding, to be 78 m long. the coefficient of kinetic friction between rubber and the pavement is about 0.90. estimate the initial speed of that car assuming a level road.

37.11231 m/s

Explanation:

u = Initial velocity

v = Final velocity = 0

s = Displacement = 78 m

g = Acceleration due to gravity = 9.81 m/s²

= Coefficient of kinetic friction = 0.9

Acceleration is given by

Equation of motion

The initial speed of that car is 37.11231 m/s

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

v=ir = 3x15 =45 v