Consider the parallel-plate capacitor shown in the figure. The plate separation is 1.8 mm and the the electric field inside is 23 N/C. An electron is positioned halfway between the plates and is given some initial velocity, vi. (a) What speed, in meters per second, must the electron have in order to make it to the negatively charged plate?

(b) If the electron has half the speed needed to reach the negative plate, it will turn around and go towards the positive plate. What will its speed be, in meters per second, when it reaches the positive plate in this case?

the answer would be   dignified - apex

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.

prndulum needs thread, weight clock to time swings