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 $B$.
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 $B$.
$(a)$ Uniformly accelerated motion.
$(b)$ Acceleration is given by the slope of speedtime graph, i.e., $a=(0-60) /(80-60)$ $=-3 m s ^{-2}$
$(c)$ Distance covered is equal'to the area under the speed-time graph, therefore,
$S=60 \times(60-20)=2400 m$
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$(i)$ Plot a velocity-time graph for the motion of the body.
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$(i)$ What is the distance travelled by the car in the first $2$ seconds ?
$(ii)$ What is the braking force at the end of $5$ seconds to bring the car to a stop within one second ?