nataliamontirl8152
02.01.2020 •
Mathematics
A1kg projectile is launched from a platform 2m above ground northwards with initial speed of 300m/s and an angle of elevation of π 4 above the horizon. if the wind applies a force of 3n to the east, find the position function of the object.
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Ответ:
the position equation of the projectile are
in x and y direction
Step-by-step explanation:
let the mass of the projectile be m, initial velocity be u
the wind applies a force of 3 newton in east direction.
therefore acceleration due to the force in east direction =
=
acceleration due to gravity is in south direction = g
let east be x direction and north be y direction.
therefore acceleration in x direction = 3 and in y direction = -g
writing equation of motion in x and y direction:
= ucos45 =
= usin45=
therefore
here 2 is added as the projectile already 2 meter above the ground
Ответ:
1)x=-6,y=1 2)a=0,b=-8 3)j=8,k=1 4)m=3,n=-6
Step-by-step explanation:
1)x-4y=-10,2x+y=-11
x-4y=-10
x=4y-10
2\left(4y-10\right)+y=-11
8y-20+y=-11
9y-20=-11
9y=9
y=1
x=4-10
x=-6
x=-6,y=1
2)a-3b=24,a+2b=-16
a-3b=24
a=3b+24
3b+24+2b=-16
5b+24=-16
5b=-40
b=-8
a=3\left(-8\right)+24
a=-24+24
a=0
a=0,b=-8
3)k-j=-7
4j-5k=27,-j+k=-7
4j-5k=27
4j=5k+27
j=\frac{1}{4}\left(5k+27\right)
j=\frac{5}{4}k+\frac{27}{4}
-\left(\frac{5}{4}k+\frac{27}{4}\right)+k=-7
-\frac{1}{4}k-\frac{27}{4}=-7
-\frac{1}{4}k=-\frac{1}{4}
k=1
j=\frac{5+27}{4}
j=8
j=8,k=1
4)m+n=-3,m-4n=27
m+n=-3
m=-n-3
-n-3-4n=27
-5n=30
n=-6
m=-\left(-6\right)-3
m=6-3
m=3
m=3,n=-6