Question

The earth's satellite is moving round the earth in a circular orbit. Which of the following are true regarding the satellite?
$1$. Its speed is constant
$2$. Its velocity is constant
$3$. Its angular momentum is constant
$4$. Its gravitational pull is balanced by the centrifugal force

• A. $1,3$ and $4$
• B. $2,3$ and $4$
• C. $1,2$ and $3$
• D. $1,2$ and $4$

Answer 1

The correct option is A $1,3$ and $4$

The earth's satellite is moving round the earth in a circular orbit with constant speed and angular momentum as it depends upon the radius.

Velocity is not constant as direction changes continuously.

It's gravitational pull is balanced by centrifugal force.