Help me solve this please?
2 answers:
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Answer:
Explanation:
information we have:
mass:
lenght:
frequency:
time:
and from the information we have we can calculate the angular velocity . which is defined as
----------------------------
Now, to calculate the torque
We use the formula
where is the moment of inertia and
is the angular acceleration
moment of inertia of a uniform rod about the end of it:
substituting known values:
for the torque we also need the acceleration which is defined as:
susbtituting known values:
and finally we substitute and
into the torque equation
:
Answer:
G. It will take twice as long.
Explanation:
Let's call the original speed of the plane and
the distance between Dallas and Pensacola. The time the plane originally takes to complete the flight is
In this problem, we are told that the plane encounters wind moving at half of its speed: , in the opposite direction. This means that the new speed of the plane is
And so, the time the plane takes now to complete the flight is
So, the plane takes twice the time as before.