The graph given below is the distance$-$time graph of an object.
$(i)$ Find the speed of the object during first four seconds of its journey.
$(ii)$ How long was it stationary ?
$(iii)$ Does it represent a real life situation ? Justify your answer.
$(i)$ $\frac{(75-0)}{(4-0)}=\frac{75}{4}=18.75 m s ^{-1}$
$(ii)$ $(14-4)=10 s$
$(iii)$ No as distance cannot decrease with time.
Give one example for each of the type of motion when
$(i)$ acceleration is in the direction of motion.
$(ii)$ acceleration is against the direction of motion.
$(iii)$ acceleration is uniform.
A body moves on three quarters of a circle of radius $r .$ The displacement and distance travelled by it are
Write true or false for the following statements
A motion is said to be uniform, if a body undergoes equal displacements in equal intervals of time.
Area under speed$-$time graph is equal to the
The direction of acceleration of an object moving in a circular path is