Maximum Height Ay
Vo = ??
Just after launch
During a lab activity in class, you are trying to collect data on a marble to determine its
launch (initial) velocity. You decide to launch the marble at 90 degrees (vertically
straight up) and measure the maximum height of the marble. After several trials of
data, you determine the average maximum height to be 4.2 m above the initial height
of the marble. Based on your measurements, what is the launch (initial) velocity of the
marble?
Assume acceleration due to gravity is -9.81 m/s2. Answer in units of meters/second.

prolly a beacuse the momentuem the car has increases while going down hill

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.

the maxium height is 34m/s