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Standard XII

Physics

Finding Average Velocity

If a body mov...

Question

If a body moves half of the distance between two points with a speed of $10 k m p h$ and remaining half with a constant speed of $15 k m p h$ , then the average speed of the body is :

12.5 k m p h

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12 k m p h

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0 k m p h

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10 k m p h

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Solution

The correct option is C $12 k m p h$
Average velocity is $2 a b / (a + b)$ , when an object travels at a speed $^{'} a^{'}$ for a half distance and speed $^{'} b^{'}$ for the rest half of the distance.
Therefore, the average speed = $2$ x $10$ x $15 / (10 + 15) = 12 k m p h$

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If a body moves half of the distance between two points with a speed of 10 kmph and remaining half with a constant speed of 15 kmph, then the average speed of the body is :

The correct option is C 12 kmphAverage velocity is 2ab/(a+b), when an object travels at a speed ′a′ for a half distance and speed ′b′ for the rest half of the distance.Therefore, the average speed = 2 x 10 x 15/(10+15)=12 kmph

If a body moves half of the distance between two points with a speed of $10 k m p h$ and remaining half with a constant speed of $15 k m p h$ , then the average speed of the body is :

The correct option is C $12 k m p h$
Average velocity is $2 a b / (a + b)$ , when an object travels at a speed $^{'} a^{'}$ for a half distance and speed $^{'} b^{'}$ for the rest half of the distance.
Therefore, the average speed = $2$ x $10$ x $15 / (10 + 15) = 12 k m p h$