Question

If p vector +Q vector =R vector and of P square +q square =r square than find the angel between the vector P vector and Q vector ? Phy questions in numerical

Answer 1

Let angle between them be x

We know

$R^2=P^2+Q^2+2PQcos x$ (1)

Given

$R^2=P^2+Q^2$

putting value of $\R^2$ in equation 1

$2PQcosx=0$

⇒$cosx=0$

⇒$x=90^o$

Answer 2

Explanation:

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