At a point P located some distance away from two charges, the electric potential created by the first charge is 5V. The electric potential created by the second charge at the same point P is 2V. What is the total electric potential at point P?a. 0Vb. 2Vc. 3Vd. 5Ve. 7V

e. 7V

Explanation:

If the potential created at the point P by the first charge is 5 V, and the electric potential created by the second charge is 2 V, as the potential is proportional to the electric field created by the charges, which is linear (due to it is directly proportional to the value of the charges), we can apply the superposition principle.

In this way, we can calculate the total potential, at a point P, as the algebraic sum of the potentials created by all the charges, as if the other ones were not present.

In this case, we have:

V = V₁ + V₂ = 5 V + 2 V = 7 V

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6

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.