Every winter I fly to Michigan. It takes 5 hours. What is my average speed?
1 answer:
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Answer:
t =1.285 s
Explanation:
u=1.43 m/s
∅=6.47°
We know that μ(k)=tan∅
F(net)=-f(k)
ma =μ(k)*m*g
a =μ(k)*g equation 1
v=u+at
0=u+(μ(k)*g*t
Putting values
t=u/(g*tan∅)
t=
t=1.285 s
Answer:
Explanation:
If we call 1 the position in space where the meteoroid of mass m speed is very small relative to Earth's (whose mass is and radius is
) and it is at a perpendicular distance of
above Earth's surface, and 2 the position when it is
above the ground, then, since in this case mechanical energy is conserved, we can write:
which means:
where K is the kinetic energy and U the gravitational potential energy. Since we can write:
which means:
And since (the distance of an object to the center of the Earth is Earth's radius plus the height of the object), we have:
This for our values is: