Physics-
General
Easy
Question
From the following displacement-time graph find out the velocity of a moving body
m/s
- 3 m/s
m/s
m/s
m/s
The correct answer is: m/s
In first instant you will apply 
and say, 
m/s.
But it is wrong because formula is valid when angle is measured with time axis.
Here angle is taken from displacement axis. So angle from time axis 
Now 
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