Start Free Mock LoginAlready registered? Login here

Physics - Vectors Question with Solution | TestHub

PhysicsVectorsAddition/SubtractionEasy2 minPYQ_2020

PhysicsEasysingle choice

If three unit vectors are inclined at an angle of $60 °$ with each other, then the magnitude of their resultant vector will be

Options:

Answer:

Solution:

We assume $\hat{a} + \hat{b} + \hat{c} = \vec{R}$

$\vec{R} \cdot \vec{R} = (\hat{a} + \hat{b} + \hat{c}) \cdot (\hat{a} + \hat{b} + \hat{c})$

$R^{2} = 1 + 1 + 1 + \cos 60 + \cos 60 + \cos 60 + \cos 60 + \cos 60 + \cos 60$

$R^{2} = 6$

$R = \sqrt{6}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:VectorsSubtopic:Addition/Subtraction

⏱ 2mℹ️ Source: PYQ_2020

Doubts & Discussion

Loading discussions...