Me i am stuck, frustrated, and dont even know how to start this problem ahhsrfhrerhyt
a car is traveling at a constant velocity of 19 m/s when the driver puts on the brakes to accelerate it at -1.4 m/s2 until stopped. how long (in s) did it take the car to stop?

give the answer with two significant digits and without the unit. your answer should be a number only.

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=