Gujarati
Hindi
2.Motion in Straight Line
medium

Velocity-time graph for a car is semicircle as shown here. Which of the following is correct :

ACar must move in circular path.
BAcceleration of car is never zero.
CMean speed of the particle is $\pi /4 \,\,m/s$.
DThe car makes a turn once during its motion.

Solution

Car is moving in straight line which changing velcoity.
$V_{a v}=\frac{d i s \tan c e}{t i m e} \Rightarrow V_{a v}=\frac{\pi a . b}{2 \times 2} \Rightarrow V_{a v}=\frac{\pi}{4}$
Standard 11
Physics

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