Answer:
250 kg
Explanation:
The mass of the rock can be found by using the formula
[tex]m = \frac{p}{v} \\ [/tex]
p is the momentum
v is the velocity
From the question we have
[tex]m = \frac{5000}{20} = \frac{500}{2} = 250 \\ [/tex]
We have the final answer as
250 kg
Hope this helps you
