One of the dangers an astronaut faces when performing a space walk is tiny pieces of debris striking them at incredibly high speeds. Determine the velocity a golf ball of 45 g would require to have the same momentum as a 2 mm piece of paint moving (m

3240 Km/hr

Explanation:

moving piece of paint m = 5.0 g  and velocity 8.1*10^3 m/s

We know that

1km=1000m

and 1hr = 3600 s

By momentum conservation we have

m1v1 = m2v2

so v2 = m1/(m2×v2)

=5×10^3/45×8.1  =900

so 900 m/s = 900 x3600/1000 = 3240 Km/hr

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