U
.
roshan makes the table below to describe how to draw a ray diagram for a convex lens.
after passing through lens
the ray goes parallel to the main axis
ray from object to lens
draw through the focal point on the
same side of the lens as the object.
draw parallel with the main axis.
the ray goes away from the main axis as
though it came from the focal point near the
object
the ray goes straight through and does not
bend
draw to the center of the lens
what error did roshan make?
the ray that goes through the center should bend and go through the focal point on the other side.
the ray that starts out parallel with the main axis should bend toward the axis and go through the focal point on the other
side.
the ray that goes parallel to the main axis after passing through the lens should also be parallel from the object to the
lens
the rays in the table describe how rays are drawn for a concave lens rather than for a convex lens.

he kicked it 10 feet straight up into the air? i think this works.

answer: electrons

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.