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Standard XIII

Physics

Rotation + Translation

Two cars P an...

Question

Two cars P and Q move with velocities ${\to v}_{P}$ and ${\to v}_{Q}$ towards north and east respectively.

Velocity of car P w.r.t. Q (i.e., velocity of car P for an observer on cars Q) i.e., ${\to v}_{P Q}$ will be in which direction?

North - west

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North - east

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South - west

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South - east

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Solution

The correct option is A
North - west

${\to v}_{P Q} = {\to v}_{P} - {\to v}_{Q} = {\to v}_{P} + (- {\to v}_{Q})$

$∴ v_{P Q}$ will be in the northwest direction.

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Two cars P and Q move with velocities →vP and →vQ towards north and east respectively. Velocity of car P w.r.t. Q (i.e., velocity of car P for an observer on cars Q) i.e., →vPQ will be in which direction?

The correct option is A North - west →vPQ=→vP−→vQ=→vP+(−→vQ) ∴vPQ will be in the northwest direction.

Two cars P and Q move with velocities ${\to v}_{P}$ and ${\to v}_{Q}$ towards north and east respectively.

Velocity of car P w.r.t. Q (i.e., velocity of car P for an observer on cars Q) i.e., ${\to v}_{P Q}$ will be in which direction?

The correct option is A
North - west

${\to v}_{P Q} = {\to v}_{P} - {\to v}_{Q} = {\to v}_{P} + (- {\to v}_{Q})$

$∴ v_{P Q}$ will be in the northwest direction.