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Mashutka [201]
2 years ago
8

If you solve this correctly I’ll give you brainliest!

Mathematics
1 answer:
Evgesh-ka [11]2 years ago
3 0
I would consider the number 2
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A projectile is fired with muzzle speed 250 m/s and an angle of elevation 45° from a position 30 m above ground level. Where doe
qaws [65]

The projectile's horizontal and vertical positions at time t are given by

x=\left(250\dfrac{\rm m}{\rm s}\right)\cos45^\circ\,t

y=30\,\mathrm m+\left(250\dfrac{\rm m}{\rm s}\right)\sin45^\circ\,t-\dfrac g2t^2

where g=9.8\dfrac{\rm m}{\mathrm s^2}. Solve y=0 for the time t it takes for the projectile to reach the ground:

30+\dfrac{250}{\sqrt2}t-4.9t^2=0\implies t\approx36.2458\,\mathrm s

In this time, the projectile will have traveled horizontally a distance of

x=\dfrac{250\frac{\rm m}{\rm s}}{\sqrt2}(36.2458\,\mathrm s)\approx6400\,\mathrm m

The projectile's horizontal and vertical velocities are given by

v_x=\left(250\dfrac{\rm m}{\rm s}\right)\cos45^\circ

v_y=\left(250\dfrac{\rm m}{\rm s}\right)\sin45^\circ-gt

At the time the projectile hits the ground, its velocity vector has horizontal component approx. 176.77 m/s and vertical component approx. -178.43 m/s, which corresponds to a speed of about \sqrt{176.77^2+(-178.43)^2}\dfrac{\rm m}{\rm s}\approx250\dfrac{\rm m}{\rm s}.

7 0
3 years ago
Sebastian wanted to order pizzas for $7 each. The delivery charge is $3.50. He has $20.
docker41 [41]

Answer:

he can buy 2

Step-by-step explanation:

8 0
3 years ago
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A contestant on a game show has 30 points. She answers a quest on correctly to win 15 points. Then she answers a question incorr
Morgarella [4.7K]
The contestants total number of points is 20.

30 + 15 = 45
45 - 25 = 20 total points
7 0
3 years ago
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I need help on this
Alisiya [41]
2. rhombus

3. rectangle

4. parallelogram 

5.trapezoid

6.quadrilateral


6 0
3 years ago
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Which is greatest to least 1.001, 1.1,1.403, 1.078
Viktor [21]
1)    1.403

2)    1.1

3)    1.078

4)    1.001

HOPE THIS HELPED :)
4 0
3 years ago
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