If a ball is tossed straight up into the air, at what position is its potential energy the greatest?
2 answers:
Answer:
A.when it reaches the top of its flight
Explanation:
The potential energy of an object is given by:
where
m is the mass of the object
g is the acceleration of gravity
h is the heigth at which the object is located above the ground
Therefore, we see that the higher the object, the larger its potential energy: this means that the ball will have the greatest potential energy at the top of its trajectory.
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To solve this problem we will apply the concepts related to the final volume of a body after undergoing a thermal expansion. To determine the temperature, we will use the given relationship as well as the theoretical value of the volumetric coefficient of thermal expansion of copper. This is, for example to the initial volume defined as , the relation with the final volume as
Initial temperature =
Let T be the temperature after expanding by the formula of volume expansion
we have,
Where is the volume coefficient of copper
Therefore the temperature is 53.06°C
The ball drops about 1 m.
