Kinematics Question 565
Question: A body of mass m moving with a uniform speed v along a circle of radius r. The change in velocity in going from A to b is [DPMT 2004]
Options:
A) $ v\sqrt{2} $
B) $ v/\sqrt{2} $
C) $ v $
D) Zero
Show Answer
Answer:
Correct Answer: A
Solution:
$ | \overrightarrow{\Delta v} |=2v\sin (\theta /2)=2v\sin ( \frac{90}{2} )=2v\sin 45 $
$ =v\sqrt{2} $
