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Vlad1618 [11]
3 years ago
5

A projectile is fired into the air, and it follows the parabolic path shown in the drawing, landing on the right. there is no ai

r resistance. at any instant, the projectile has a velocity v overscript rightwards harpoon with barb upwards endscripts and an acceleration a overscript rightwards harpoon with barb upwards endscripts. which one or more of the drawings could not represent the directions for v overscript rightwards harpoon with barb upwards endscripts and a overscript rightwards harpoon with barb upwards endscripts at any point on the trajectory?
Mathematics
1 answer:
Eva8 [605]3 years ago
4 0

Answer : Neither option A nor option C could represent the directions for v overscript rightwards harpoon with barb upwards endscripts and a overscript rightwards harpoon with barb upwards endscripts at any point on the trajectory.

As the acceleration is always downward, and also in this question the only force acting is the projectiles weight. Therefore, it is experiencing downward acceleration at  any point of time.

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If it took eight men ten hours to build a wall, how many hours would it take four men to build it?
arlik [135]
Two hours bc if it takes 8 to do it in one hour and u split the number of men u have in half you double the work hours 8men=1hour of work 4men=2hours of work
Hope this helps have a nice day
4 0
2 years ago
Read 2 more answers
The sun appears to move across the sky, because the earth spins on its axis. To a person standing on the earth, the sun subtends
Liono4ka [1.6K]

Answer:

128 seconds

Step-by-step explanation:

The sun subtends an angle \theta=9.28\times10^{-3} rad

Angular velocity equation is \omega = \frac{\theta}{t}

where \omega is angular velocity and t is time.

Earth spins at a rate of :

\omega = \frac{2 \pi rad}{24 h \times \frac{3600 s}{1 h}} = 7.27221\times10^{-5}  rad/s

Isolating time (t) from angular velocity equation gives:

\omega = \frac{\theta}{t}

t = \frac{\theta}{\omega}

t = \frac{9.28\times10^{-3}}{7.27221\times10^{-5}}

t = 128 s

8 0
3 years ago
if a 14 foot tree casts a 8 foot long shadow. how tall is a tree that casts a 4 foot long shadow?
kvasek [131]

7-foot

EXPLANAT

Given:

14 foot tree

8foot shadow

4foot shadow

Let h be the height of a tee that casts a 4 foot long shadow.

Using proportion;

14 foot = 8 ft shadow

h = 4 ft shadow

Cross - multiply

8h = 56

Divide both-side by 8

h = 7 foot.

Hence, the tree is 7-foot.

4 0
1 year ago
Examine the data below for a stalk of corn. Logarithmic regression Use logarithmic regression to find an equation of the form y
masya89 [10]

The value of <em>a</em> and <em>b</em> for the data values of stalk of corn using the logarithmic regression is -76.2038 and 37.6735 respectively.

<h3>What is logarithmic regression?</h3>

Logarithmic regression is a type of regression which is used to model the statement in which the growth or decay initially at rapid rate, and then slow down with respect to time.

The data of the table for the day and height of the stalk of corn is listed below.

Day (<em>x</em>)                9    12    22    40    

Height (<em>y</em>) in        5    17    45    60  

Mean of x values,

m_x=\dfrac{9+12+22+40}{4}\\m_x=17.5581

Mean of y values,

m_y=\dfrac{5+17+45+60}{4}\\m_y=31.75

For the above table, the value of correlation coefficient is 0.99133. For these values, the logarithmic regression can be given as,

y = -76.2038+37.6735\ln(x)

Compare it with the following logarithmic regression equation, we get

y = a+b\ln(x)

a=-76.2038\\b=37.6735

Hence, the value of <em>a</em> and <em>b</em> for the data values of stalk of corn using the logarithmic regression is -76.2038 and 37.6735 respectively.

Learn more about the logarithmic regression here;

brainly.com/question/25226042

5 0
2 years ago
What is the quotient of x^4-5/x+1
Ilia_Sergeevich [38]
The answer will be x^3-5. Hope it help!
3 0
3 years ago
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