An electron moves through a region with a uniform magnetic field of unknown magnitude directed in the +y direction. At the insta
1 answer:
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Answer:
6.3 rev/s
Explanation:
The new rotation rate of the satellite can be found by conservation of the angular momentum (L):
The initial moment of inertia of the satellite (a solid sphere) is given by:
Where : is the satellite mass and r: is the satellite's radium
Now, the final moment of inertia is given by the satellite and the antennas (rod):
Where : is the antenna's mass and l: is the lenght of the antenna
So, the new rotation rate of the satellite is:
Therefore, the new rotation rate of the satellite is 6.3 rev/s.
I hope it helps you!
The plane takes 4.76 s to reach the end of the runway
Explanation:
The motion of the airplane is a uniformly accelerated motion (=at constant acceleration), therefore we can solve the problem by using the following suvat equation:
where
s is the distance covered
u is the initial velocity
t is the time elapsed
a is the acceleration
In this problem, we have:
s = 102 m is the lenght of the runway
u = 0 is the initial velocity of the airplane
is its acceleration
Solving for t, we find the time needed to reach the end of the runway:
Learn more about accelerated motion:
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