Spherical mirror: you wish to create an image that is 10 meters from an object. this image is to be upright and half the height of the object. you wish to accomplish this using one spherical mirror. part a)what is the focal length f of the mirror that would accomplish this? express your answer in meters, as a fraction or to three significant figures. part b)is this a concave or convex mirror? part c)what is the magnitude r of the radius of curvature of this mirror? part d)what type of image is created, real or virtual?

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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.