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

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.

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Phúc Điền 4 mins 2021-07-22T08:29:51+00:00 1 Answers 0 views 0

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    2021-07-22T08:31:40+00:00

    Answer:

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

    Explanation:

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

    50g(\frac{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=\frac{1}{2}mv^2

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

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