The position-time graph describes the motion of a moving object. Describe the motion represented by each segment of the graph. A graph with time (s) on the x-axis and position (m) on the y-axis. Point A is at (20, 0), point B is at (20, 20), point C is at (40, 40), point D is at (60, 60), point E is at (80, 60), and point F is at (100, 80). A horizontal line connects points A and B, and another horizontal line connects points D and E. A diagonal line connects points C and D. A curve connects points B and C, rising slowly near B and more quickly near C. Another curve connects points E and F, rising quickly near E and slowly near F.

Group of answer choices
from point A to point B

not moving
from point B to point C

[ Choose ]
from point C to point D

constant velocity
from point D to point E

[ Choose ]
from point E to point F

[ Choose ]

Help me plz

3.2x10^7

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.

+15-35=-20

going in opposite directions

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.