Aball is thrown up into the air. when it falls back down and reaches the
ground, its final downward velocity is 8.0 m/s. what was the maximum height
of the ball? (hint: keinitial = 0, pefinal = 0.)
o a. 3.3 m
o b. 6.5 m
o c. 0.41
o d. 32 m

A. 3.3 m

Explanation:

Here, we have to use conservation of energy principle.

When the ball is at maximum height, the instantaneous velocity at that point is 0 m/s. So, the kinetic energy of the ball is also 0 at the maximum height. Thus, at maximum height, the energy possessed by the ball is gravitational potential energy only.

Now, when the ball reaches the ground, all the gravitational potential energy changes into kinetic energy because of the conservation of energy.

Therefore, the energy transformation can be given as:

Decrease in potential energy = Increase in Kinetic energy

Decrease in potential energy is given as:

Increase in kinetic energy is given as:

Therefore,

Now, plug in 8 for , 9.8 for and solve for height . This gives,

Therefore, the maximum height reached by the ball is 3.3 m.

first thing first of the answer is with technology. second thing second thing is that the big bang theory did not happened u see they say it did but what they dont realize is that like dinasures are still a round they might deny it but they and look at these 12 foot human skelteons they find lets see didnt the bible say something about giants. hope this peace.