Find the momentum on a 50 gram rock traveling at 30 m/s in kgm/s. Then find how much kinetic energy the same rock has in Joules.

Question

asked Oct 25, 2021 7.1k views

1 Answer

Victor Savkin · Answer 1 · 2021-10-31T18:00:39+0000

Answer:

$p=1.5kgm/s\\K=22.50J$

Step-by-step explanation:

First of all the mass in in g and we need it in kg, so let's convert it.

50g((1kg)/(1000g))=0.050kg

Now we can proceed.

Find the momentum.

p=m*v

$p=(30m/s)(0.050kg)\\p=1.5kgm/s$

Now let's find the kinectic energy that this rock has in Joules.

K=(1)/(2)mv^2

$K=(1)/(2)(0.050kg)(30m/s)^2\\ K=(1)/(2)(0.050kg)(900m^2/s^2)\\ K=22.50J$