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 |
(b)
Here, kg ; m
Acceleration of first astronaut,
Acceleration of second astronaut,
Net acceleration of approach
As
second
On solving we get days