Which statement best explains the difference between velocity and speed?
2 answers:
Explanation:
Speed : It is defined as the overall distance travelled by an object divided by total time taken. The mathematical expression is given by :
It is a scalar quantity i.e. it has only magnitude.
Velocity : It is defined as the total displacement (D) of the particle divided by total time taken. It can be given by :
It is a vector quantity. It have both magnitude and direction.
Out of given options, the statement that best explains the difference between velocity and speed is (B) i.e. "Velocity is a vector and requires a direction to completely describe it".
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Answer:
The acceleration that the jet liner that must have is 2.241 meters per square second.
Explanation:
Let suppose that the jet liner accelerates uniformly. From statement we know the initial () and final speeds (
), measured in meters per second, of the aircraft and likewise the runway length (
), measured in meters. The following kinematic equation is used to calculate the minimum acceleration needed (
), measured in meters per square second:
If we know that ,
and
, then the acceleration that the jet must have is:
The acceleration that the jet liner that must have is 2.241 meters per square second.