Imagine that you are swinging a yoyo in a vertical clockwise circle in front of you, perpendicular to the direction you are facing. Now, imagine that the string breaks just as the yoyo reaches its bottom most position, nearest the floor. Which of the following describes the path of the yoyo after the string breaks? A. Fly upward in the direction of the centripetal force.
B. Fly downward in the direction of centripetal force.
C. Fly left in direction of tangent velocity.
D. Fly right in the direction of the tangent velocity.

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true

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.