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3 years ago

What are 2 key differences between electric force and gravitational force?

1 answer:

8 0

Electric force is force between 2 charges seperated by distance in space.While gravitational force has to be dependent on the independent action.

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an underground cannon launches a cannonball from ground level at a 35-degree angle. the cannonball is shot with an initial veloc

Allushta [10]

Answer:

$\displaystyle x_{max}=21.57\ m$

$\displaystyle y_{max}=3.78\ m$

Explanation:

Motion in Two-Dimensions

When an object is launched with a certain angle $\theta$ above ground level with an initial velocity $\vec v_o$ , it describes a curve called a parabola, defined by the force of gravity which will eventually make the object return to the ground. There are two overlapping motions, the horizontal motion, at a constant speed, and the vertical motion, at changing speed because the acceleration of gravity modifies it. The velocity $\vec v_o$ is split into two components x,y

$\displaystyle v_{ox}=|vo|\ Cos\theta$

$\displaystyle v_{oy}=|vo|\ Sin\theta$

The position of the object is also split into its components, assuming the object was launched from ground level

$\displaystyle x=v_{ox}.t$

$\displaystyle y=v_{oy}.t-\frac{g.t^2}{2}$

The maximum horizontal distance the object reaches (called range) is

$\displaystyle x_{max}=\frac{2v_{ox}\ v_{oy}}{g}$

The maximum height is given by

$\displaystyle y_{max}=\frac{v_{oy}^2}{2g}$

The question doesn't ask for anything in particular, but to guide you in the solution of your own problem, we'll compute $X_{max}$ and $Y_{max}$ for you. The data is

$\displaystyle |vo|=15\ m/s\ ,\ \theta =35^o$

Let's compute the range

$\displaystyle x_{max}=\frac{(2)(15)\ cos35^o\ (15)\ sen35^o}{9.8}$

$\displaystyle x_{max}=\frac{211.43}{9.8}=21.57\ m$

Now for the maximum height

$\displaystyle y_{max}=\frac{(15\ . \ Sin35^o)^2}{2(9.8)}$

$\displaystyle y_{max}=\frac{74.0227}{19.6}$

$\displaystyle y_{max}=3.78\ m$

6 0

3 years ago

Humans must depend on the environment for their survival. True False

Alisiya [41]

Answer:

true

Explanation:

with out trees we would have no air with out animals the envirounment would slowly decay

8 0

3 years ago

Read 2 more answers

What would happen if you removed the jaguar from this food web?

babunello [35]

If it was removed it would not be a predator

3 0

3 years ago

Read 2 more answers

What is the effect of a larger acceleration on launch velocity?

vredina [299]

Answer:

Concept: Physical Concepts

A larger acceleration, which is the change in velocity divided by the change in time is the theta or the angle that it climbs to.
Secondly the launch velocity is higher or faster and traveles a further distance.

7 0

3 years ago

Scientists have detected sound waves with frequencies as low as 13 Hz being produced by

Lena [83]

Answer:

The wavelength of the sound waves are, λ = 26.92 m

Explanation:

Given data,

The frequency of the sound waves, f = 13 Hz

The speed of sound waves in air, v = 350 m/s

The velocity of the wave in the medium is equal to the product of its wavelength and its frequency.

The formula for the wavelength of the waves is,

λ = v / f

Substituting the given values in the above equations,

λ = 350 m/s / 13 Hz

= 26.92 m

Hence, the wavelength of the sound waves are, λ = 26.92 m

4 0

4 years ago