Please help! An alert driver can apply the brakes fully in about 0.5 seconds (s).if the car traveled 58 meters after the brakes were applied, what was the velocity of the car before braking, in m/s^2?

Describe uniform velocity and variable velocity in short

Two conductors, a and b, are each in the shape of a tetrahedron. but of different sizes. they are charged in the following manner: 1. tetrahedron a is charged from an electrostatic generator to charge q. 2. tetrahedron a is briefly touched to tetrahedron b. 3. steps 1 and 2 are repeated until the charge on tetrahedron b reaches a maximum value. if the charge on tetrahedron b was q/4 after the first time it touched tetrahedron a. what is the final charge qbmax on tetrahedron b?

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?