If it takes 3.5 hours for the hogwarts express, moving at a speed of 120 mi/hr, to make it from platform 9 and 3/4 to hogwarts,
1 answer:
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Answer:
<h2>9,226,250 J</h2>Explanation:
The kinetic energy of an object can be found by using the formula
v is the velocity
m is the mass
From the question we have
We have the final answer as
<h3>9,226,250 J</h3>Hope this helps you
Let be the height of the building and thus the initial height of the ball. The ball's altitude at time
is given by
where is the acceleration due to gravity.
The ball reaches the ground when after
. Solve for
:
so the building is about 16 m tall (keeping track of significant digits).