An electron with a charge of -1.6 × 10-19 coulombs experiences a field of 1.4 × 105 newtons/coulomb. what is the magnitude of the electric force on this electron due to this field?

1.6 × 10-3 newtons

1.4 × 1024 newtons

2.2 × 10-14 newtons

7.4 × 10-13 newtons

4.5 × 1014 newtons

2.2 × 10-14 newtons

Explanation:

The electric force exerted on a charged particle is given by

where we have in this case:

is the charge of the electron

is the strength of the electric field

Since we are only interested in the magnitude of the electric force, we can neglect the negative sign of the charge; therefore, the strength of the electric force is

true tan speed = ang vel x radius

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.