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sladkih [1.3K]
3 years ago
13

A bullet is fired vertically upward from a gun with an initial velocity of 225 m/s. How high does the bullet go in meters? [Igno

re air resistance]
Physics
1 answer:
Alchen [17]3 years ago
7 0

Answer:

h= 2582.9 m

Explanation:

bullet kinematics:  bullet moves with uniformly accelerated movement in freefall  

The negative sign in the equation indicates that the acceleration (g) is in the direction opposite to the movement of the  bullet.

v f₁²=v₀²-2g*h₁  Equation (1))

h: hight in meters (m)  

v₀: initial speed in m/s  

vf: final speed in m/s  

Known data

v₀=  225 m/s

g= 9.8 m/s² : acceleration due to gravity

Problem development

When the  bulletl reaches the maximum height the final speed is equal to zero. vf=0

We replace data in the equation (1)

v f₁²=v₀²-2g*h₁

0 =  (225)²-2*9.8*h

2*9.8*h=(225)²

h= (225)²/ (2*9.8)

h= 2582.9 m

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<h2>Hey There!</h2><h2>_____________________________________</h2><h2>Answer:</h2>

\huge\boxed{OptionA}

<h2>_____________________________________</h2><h2>DATA:</h2><h3>Blue Car: </h3>

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<h3 /><h3>Orange truck:</h3>

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<h3 /><h3>Grey Car:</h3>

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<h3 /><h3>Green Car:</h3>

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<h2>_____________________________________</h2><h2>SOLUTION:</h2>

By the equation of kinetic energy,

                                       

                                         K.E = \frac{1}{2} mv^2

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            K.E is kinetic energy

            m is mass

            v is velocity

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Directly substitute the variables in the equation,

                                       

                                       K.E = \frac{1}{2}x4x5^2

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                                       K.E = 50 J

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 Directly substitude the variable in the equation,

                                                           

                                        K.E = \frac{1}{2}x6x4^2

Simplify the equation,

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<h2>_____________________________________</h2><h3>Kinetic Energy of Green Car:</h3><h3 />

Substitute the variables in the equation,

                                         

                                         K.E = \frac{1}{2}x8x3^2

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