Brutus Buckeye is driving north on OH-315 at 29.0 m/s when he sees Hugh Jackman, The Wolverine, driving south on OH-315 at 30.5 m/s and waves at him. Hugh blasts his 500 Hz horns as they pass. Assume all travel in this problem happens in a straight line. a. As they travel towards each other, what wavelength of sound does Brutus hear.
b. After they pass each other (maintaining their original speeds), what wavelength of sound does Brutus hear?
c. All this honking causes a traffic jam and both cars come to a complete stop 200 m apart. What wavelength of sound does Brutus hear now?

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.

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.