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2 years ago

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A plane traveled west for 4.0 hours and covered a distance of 4,400 kilometers. What was its velocity? 18,000 km/hr 1,800 km/hr,

west 1,100 km/hr 1,100 km/hr, west

2 answers:

Airida [17]2 years ago

8 0

west 1100 km / hr ..

Lorico [155]2 years ago

5 0

Answer: The correct answer is 1,100 km/hour.

Explanation:

Displacement of the plane = 4,400 km

Time taken by the plane = 4.0 hour

$Velocity=\frac{Displacement}{time}=\frac{4,400 km}{4.0 hour}=1,100 km/hour$

Since, Velocity is a vector quantity which means it has direction with magnitude. So, the velocity of the plane is 1,100 km /hour west.

Hence, the correct answer is 1,100 km/hour.

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vredina [299]

Answer:

The angular speed after 6s is $\omega = 1466.67s^{-1}$ .

Explanation:

The equation

$I\alpha = Fd$

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In our case, the force applied is $F = 22N$ , at a distance $d = 6cm =0.06m$ , to a ring with the moment of inertia of $I =mr^2$ ; therefore, the angular acceleration is

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$\alpha =\frac{22N*0.06m}{(1.5kg)*(0.06)^2}$

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Therefore, the angular speed $\omega$ which is

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$\omega = 244.44$\: s^{-2}* 6s$

$\boxed{\omega = 1466.67s^{-1}}$

7 0

2 years ago

Imagine you’re driving along a road and you approach a bridge. You notice a sign that reads, “Bridge freezes before road.” Why d

nydimaria [60]

<u>Answer:</u>

<h3>During wet and freezing temperatures, ice is able to form at a faster pace on bridges because freezing winds blow from above and below and both sides of the bridge, causing heat to quickly escape. The road freezes slower because it is merely losing heat through its surface.</h3>

<u>Sources:</u>

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2 years ago

the millersburg ferry (m=13000.0 kg loaded) puts its engines in full reverse and stops in 65 seconds. if the speed before brakin

kenny6666 [7]

The braking force is -400 N

Explanation:

We can solve this problem by using the impulse theorem, which states that the impulse applied on the ferry (the product of force and time) is equal to its change in momentum:

$F \Delta t = m(v-u)$

where in this problem, we have:

F is the force applied by the brakes

$\Delta t = 65 s$ is the time interval

m = 13,000 kg is the mass of the ferry

u = 2.0 m/s is the initial velocity

v = 0 is the final velocity

And solving for F, we find the force applied by the brakes:

$F=\frac{m(v-u)}{\Delta t}=\frac{(13000)(0-2.0)}{65}=-400 N$

where the negative sign indicates that the direction is backward.

Learn more about impulse:

brainly.com/question/9484203

#LearnwithBrainly

4 0

2 years ago

Consider the position vs. time graph below for a woman's movement in a hallway. What is the woman's velocity from 4 to 5 s?

Ksenya-84 [330]

Answer:

The answer is " $6\ \frac{m}{s}$ "

Explanation:

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$\to \overline{v}={\frac{\Delta x}{\Delta t}}$

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1 year ago

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yulyashka [42]

Answer:

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2 years ago