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Standard XII

Physics

Vector Addition

lf the initia...

Question

lf the initial velocity of a body is $V_{1}$ and final velocity is $V_{2}$ and the angle between $V_{1}$ and $V_{2}$ is $ϕ$ , then the change in velocity is:

V_{2} - V_{1}

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\sqrt{V_{2}^{2} + V_{1}^{2}}

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\sqrt{V_{1}^{2} + V_{2}^{2} - 2 V_{1} V_{2} cos ϕ}

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\sqrt{V_{1}^{2} + V_{2}^{2} + 2 V_{1} V_{2} cos ϕ}

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Solution

The correct option is A $V_{2} - V_{1}$
Change in velocity will be vector quantity $V_{2} - V_{1}$ , whereas all other options are scalar quantities.

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lf the initial velocity of a body is V1 and final velocity is V2 and the angle between V1 and V2 is ϕ, then the change in velocity is:

The correct option is A V2−V1Change in velocity will be vector quantity V2−V1, whereas all other options are scalar quantities.

lf the initial velocity of a body is $V_{1}$ and final velocity is $V_{2}$ and the angle between $V_{1}$ and $V_{2}$ is $ϕ$ , then the change in velocity is:

The correct option is A $V_{2} - V_{1}$
Change in velocity will be vector quantity $V_{2} - V_{1}$ , whereas all other options are scalar quantities.