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JIPMER 2006

Exam: JIPMER
Year: 2006
Subject: Physics
Chapter: Gravitation

JIPMER 2006 · Physics · Gravitation

Two planets are revolving around the earth with velocities v_1 and...

Two planets are revolving around the earth with velocities

v_1 and v_2

and in radii r_1 and

r_2 \left(r_1 \gt r_2\right) respectively. Then:

Options

A $v_1=v_2$
B $v_1 \gt v_2$
C $v_1 \lt v_2$
D $\frac{v_1}{r_1}=\frac{v_2}{r_2}$

Correct answer

B. $v_1 \gt v_2$

Step-by-step solution

Orbital velocity

v=\sqrt{g r}

\frac{v_1}{v_2}=\sqrt{\frac{r_1}{r_2}}

As,

r_1 \gt r_2

so,

v_1 \gt v_2

.

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