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swat32
3 years ago
13

A group of a few thousand stars that are loosely held together by gravity is called a

Physics
1 answer:
zalisa [80]3 years ago
8 0
Would it be an open cluster 

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A 8.34 × 103-kg lunar landing craft is about to touch down on the surface of the moon, where the acceleration due to gravity is
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21870.3156 N

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u = Initial velocity

v = Final velocity

s = Displacement

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v^2-u^2=2as\\\Rightarrow a=\frac{v^2-u^2}{2s}\\\Rightarrow a=\frac{0^2-18.2^2}{2\times 162}\\\Rightarrow a=-1.02234\ m/s^2

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Thrust

F_t=F+W\\\Rightarrow F_t=8526.3156+13344\\\Rightarrow F_t=21870.3156\ N

The thrust needed to reduce the velocity to zero at the instant when the craft touches the lunar surface is 21870.3156 N

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