When is an object in motion considered to be a point object ?

A cheetah can accelerate from rest at the rate of $4 m s^{-2}$

$(i)$ What will be the velocity attained by it in $10\, s$ ?

$(ii)$ How far will it travel in this duration ?

$(a)$ Define circular motion.

$(b)$ "Uniform circular motion is an accelerated motion". Justify this statement with reason.

$(c)$ An artificial satellite is moving in a circular orbit of radius $42250\, km.$ Calculate its speed if it takes $24$ hours to revolve once around the earth.

Mention some uses of velocity$-$time graphs.

Slope of a velocity -time graph gives