First slide

Universal law of gravitation

Question

Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will

Easy

A

move towards each other.
B

move away from each other.
C

will become stationary.
D

keep floating at the same distance between them.

Solution

Since two astronauts are floating in gravitational free space. The only force acting on the two astronauts is the gravitational pull of their masses,
$F = \frac{G m_{1} m_{2}}{r^{2}}$
which is attractive in nature.
Hence they move towards each other.

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