Single Choice

In a two dimensional motion, instantaneous speed $$ { v }_{ 0 } $$ is a positive constant. Then which of the following are necessarily true?

AThe average velocity is not zero at any time
BAverage acceleration must always vanish
CDisplacements in equal time intervals are equal
DEqual path lengths are traversed in equal intervals
Correct Answer

Solution

Speed = $$\dfrac{distance}{time}$$
This motion is two dimensional and given that instantaneous speed $$v_{0}$$ is positive constant. Acceleration is defined as the rate of change of velocity (instantaneous speed), hence it will also be in the plane of motion.

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