Answer:
[tex]p=1.5kgm/s\\K=22.50J[/tex]
Explanation:
First of all the mass in in g and we need it in kg, so let's convert it.
[tex]50g(\frac{1kg}{1000g})=0.050kg[/tex]
Now we can proceed.
Find the momentum.
[tex]p=m*v[/tex]
[tex]p=(30m/s)(0.050kg)\\p=1.5kgm/s[/tex]
Now let's find the kinectic energy that this rock has in Joules.
[tex]K=\frac{1}{2}mv^2[/tex]
[tex]K=\frac{1}{2}(0.050kg)(30m/s)^2\\ K=\frac{1}{2}(0.050kg)(900m^2/s^2)\\ K=22.50J[/tex]
