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Q. A particle, moving with uniform speed v, changes direction by an angle $\theta$ in time t. Magnitude of its average acceleration during this time is

Motion in a Straight Line

Solution:

$a_{av} = \left| \frac{\Delta \nu}{\Delta t} \right| = \frac{|V_t - V_t|}{t} = \frac{\sqrt{\nu^2 + \nu^2 - 2 \nu.\nu . \cos \, \theta}}{t}$