Two graphs for motion of objects moving along a straight line are shown. State how the speed is changing with time in both cases.
Case $1$ : Speed is constant.
Case $2$ : Variable speed.
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 $km\, h^{-1}$).
Which of the following is not a vector ?
The position$-$time graph for the motion of a car is given below
$(i)$ How far the car tavelled in the time interval $2$ to $6 s ?$
$(ii)$ During which interval of time its speed was more?
$(iii)$ Calculate the average speed of the car.
A train $100 \,m$ long is moving with a velocity of $60\, km h^{-1}$. Find the time it takes to cross the bridge $1\, km$ long.
$(a)$ Define uniform circular motion.
$(b)$ Is the uniform circular motion an accelerated motion? Give reasons for your answer.
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