2. Motion in a straight line

Concept Card: Speed, Velocity & Types of Motion 1. Speed vs. Velocity: Speed ($v$): The rate at which distance is covered with respect to time. It is a scalar quantity ($v \ge 0$) with dimensions $[L T^{-1}]$ and SI unit $\text{m/s}$. Velocity ($\vec{v}$): The rate of change of the position vector with respect to time … Read more

Concept Card: Frame of Reference, Distance & Displacement in 1D Motion 1. Frame of Reference: A frame of reference is a coordinate system (Cartesian axes $x, y, z$) attached to an observer along with a calibrated clock to record the time coordinate $t$. Inertial Frame of Reference: A frame in which Newton’s First Law of … Read more