A real heat engine operates between temperatures Tc and Th. During a certain time, an amount Qc of heat is released to the cold
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Answer:
(a) ,
(b) When , object is slowing down, when
object is speeding up.
Explanation:
(a) To get the velocity function, we need to take the derivative of the position function.
To get the acceleration function, we need to take the derivative of the velocity function.
(b) The object is slowing down when velocity is decreasing by time (decelerating) hence a < 0
On the other hand, object is speeding up when a > 0
Therefore, when , object is slowing down, when
object is speeding up.