Jeffrey K. answered 09/21/20
Together, we build an iron base in mathematics and physics
Gnarls, here's how to tackle this one.
(a) The relevant equation of motion is: v2 = v02 + 2as
We know a, the acceleration of gravity, and s, the distance the meteorite travels.
However, we aren't given the meteor's initial speed, v0.
Therefore, this problem can't be done with the given information!
BTW Meteors enter the earth's atmosphere at high speeds, ranging from 11 km/sec to 72 km/sec (25,000 to 160,000 mph).
b) No, we are given v0 = 1,800 m/s. Applying the equation in part a):
v2 = 18002 + 2 x 9.8 x 7.1 x 106
Therefore, KE = 1/2 mv2 = 0.5 ( 18002 + 2 x 9.8 x 7.1 x 106)
I leave the calculation for you, as an exrecise!