A car travels a distance of d1 = 36 km with an average speed of v1 -44 km/h and then travels a distance of d2 = 84 km with an average speed of v2 66 km/ h. What is the value of the average speed of the car over the total travel of 120 km?
Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
Average speed =(Total distance)/(Total time)
total distance=(36+84)km
total=t1+t2
t1=d1/v1
and
t2=d2/v2
in this way the AVERAGE SPEED COMES OUT TO BE 57.3913km/hr
SO the option(D) is correct.
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