What can you say about the motion of a body if its displacement$-$time graph is a straight line parallel to the time axis ?
The body is at rest.
A driver of a train travelling at $40\, m s ^{-1}$ applies the breaks as a train enters a station. The train slows down at a rate of $2\, m s ^{-2} .$ The platform is $400\, m$ long. Will the train stop in time ?
Study the speed$-$time graph of a car below and answer the following questions
$(a)$ What type of motion is represented by $OA$ ?
$(b)$ Find acceleration from $B$ to $C$.
$(c)$ Calculate the distance covered by the body from $A$ to $B$.
$(a)$ Define uniform circular motion.
$(b)$ Is the uniform circular motion an accelerated motion? Give reasons for your answer.
A motorcyclist drives from $A$ to $B$ with a uniform speed of $30\, km\, h^{-1}$ and returns back with a speed of $20 \,km \,h^{-1}$. Find its average speed(in $km\, h^{-1}$).
A person standing at $A$ goes to $B$ by following any of the paths $1,2$ or $3 .$ Which path we can measure to find the average velocity ?
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