Two astronauts have deserted their space ships in a region of space far from the gravitational attraction of any other body. Each has a mass of 100 kg and they are 100 m apart. They are initially at rest relative to one another. How long will it be before the gravitational attraction brings them 1 cm closer together? |
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a) |
2.52 days |
b) |
1.41 days |
c) |
0.70 days |
d) |
0.41 days |

Two astronauts have deserted their space ships in a region of space far from the gravitational attraction of any other body. Each has a mass of 100 kg and they are 100 m apart. They are initially at rest relative to one another. How long will it be before the gravitational attraction brings them 1 cm closer together? |
|||||||

a) |
2.52 days |
b) |
1.41 days |
c) |
0.70 days |
d) |
0.41 days |

1 Answer

127 votes

**(b)**

Here, kg ; m

Acceleration of first astronaut,

Acceleration of second astronaut,

Net acceleration of approach

As

second

On solving we get days

127 votes

127