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Standard XII

Physics

Relative Velocity

When two bodi...

Question

When two bodies move uniformly towards each other,the distance between them diminishes by $16 m$ every $10 s$ .If bodies move with velocities of the same magnitude and in the same direction as before the distance between then will decease $3 m$ every $5 s$ .The velocity of each body is

1.5 m / s, 0.8 m / s

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1.1 m / s, 0.5 m / s

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2.4 m / s, 1.5 m / s

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3.0 m / s, 1.5 m / s

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Solution

The correct option is B $1.1 m / s, 0.5 m / s$
$1 s t$ case relative velocity $= v_{1} + v_{2} = \frac{16}{10} = 1.6$
$2 n d$ case relative velocity = $v_{1} - v_{2} = \frac{3}{5} = 0.6$
$v_{1} = 1.1, v_{2} = 0.5$

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When two bodies move uniformly towards each other,the distance between them diminishes by 16m every 10s.If bodies move with velocities of the same magnitude and in the same direction as before the distance between then will decease 3m every 5s.The velocity of each body is

The correct option is B 1.1m/s,0.5m/s1st case relative velocity =v1+v2=1610=1.62nd case relative velocity =v1−v2=35=0.6v1=1.1,v2=0.5

When two bodies move uniformly towards each other,the distance between them diminishes by $16 m$ every $10 s$ .If bodies move with velocities of the same magnitude and in the same direction as before the distance between then will decease $3 m$ every $5 s$ .The velocity of each body is

The correct option is B $1.1 m / s, 0.5 m / s$
$1 s t$ case relative velocity $= v_{1} + v_{2} = \frac{16}{10} = 1.6$
$2 n d$ case relative velocity = $v_{1} - v_{2} = \frac{3}{5} = 0.6$
$v_{1} = 1.1, v_{2} = 0.5$