If a girl is standing in front of a smooth surface from which a sound is reflected, the girl may hear
2 answers:
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Answer:
The value is
Explanation:
From the question we are told that
The initial speed of the roller coaster is
The length of the hill is
The acceleration of the roller coaster is
Generally the acceleration is mathematically represented as
Here is the initial time which is equal to zero
is the final velocity which is mathematically represented as
So
Solving this using quadratic formula we obtain
Generally time cannot be negative so
Generally the final velocity is mathematically represented as