$(a)$ Write differences between speed and velocity.
$(b)$ The speed of a moving object is $x m s ^{-1}$. Its velocity is $y m s ^{-1}$. What is the similarity observed ?
$(a)$ Speed is distance travelled per unit time, whereas velocity is displacement per unit time. Speed cannot be zero, displacement can be zero.
$(b)$ Both have the same units.
The velocity$-$time graph of a truck is plotted below
$(a)$ Calculate the magnitude of displacement of the truck in $15$ seconds.
$(b)$ During which part of the journey was the truck decelerating ?
$(c)$ Calculate the magnitude of average velocity of the truck.
What can you conclude about the motion of a body depicted by the velocity-time graphs $(i), (ii)$ and $(iii)$ given below ?
Draw displacement$-$time graphs for the following situations
$(i)$ When body is stationary.
$(ii)$ When body is moving with uniform velocity.
$(iii)$ When body is moving with variable velocity.
How can you find the distance travelled by body in uniform motion from the velocity$-$time graph ?
What determines the direction of motion of an object velocity or acceleration ?