Acar starts from rest and accelerate at a constant rate. after the car has gone 50m it has a speed of 21 m/s. what is the acceleration of the car?

If the force on an object is in the negative direction, the work it does on the object must be [2 points a) negative. b) positive c) the work could be either positive or negative, depending on the direction the object moves

When a neutral charge, comes into contact with a positive charge they repel each other nothing happens the neutral charge becomes negative they attract each other

The movement of electrons between atoms is called an