A). Gravity makes falling objects fall 9.8 m/s faster every second.
After 1.5 seconds, it's falling at (1.5 x 9.8) = 14.7 m/s .
b). The average speed of the physics book is (1/2) (0 + 14.7) = 7.35 m/s .
Falling at an average speed of 7.35 m/s for 1.5 seconds,
the book falls
(1.5 x 7.35) = 11.025 meters
Answer:
Option A is correct.
Inheritance, superclass, subclass
A new class of objects can be created conveniently by **inheritance**; the new class (called the **superclass**) starts with the characteristics of an existing class (called the **subclass**), possibly customizing them and adding unique characteristics of its own.
Explanation:
A class is a term in object oriented programming that is extensible program code used to create, name and implement what you want the objects to do.
Inheritance is used to describe the making of new classes from already existing classes. The general properties of the old classes remain in the new classes created from them.
Hence, the new classes (because they're usually an improvement on the old classes as they hold on to the wanted properties of the old classes and additional great ones are added or modified) are called superclasses and the old, already existing ones are called subclasses.
128.1-127.8= 0.3Hz
<span>129.1-128.1= 1.0Hz </span>
<span>129.1-127.8= 1.3Hz</span>
