Her acceleration is zero, because her velocity is not changing.
Answer:
3.67 km
Explanation:
Joe distance towards coffee shop is,
![OB=0.40 km](https://tex.z-dn.net/?f=OB%3D0.40%20km)
And the Max distance towards bookstore is,
![OA=3.65 km](https://tex.z-dn.net/?f=OA%3D3.65%20km)
Now the distance between the Joy and Max will be,
By applying pythagorus theorem,
![AB=\sqrt{OB^{2}+OA^{2}}](https://tex.z-dn.net/?f=AB%3D%5Csqrt%7BOB%5E%7B2%7D%2BOA%5E%7B2%7D%7D)
Substitute 0.40 km for OB and 3.65 km for OA in the above equation.
![AB=\sqrt{0.40^{2}+3.65^{2}}\\AB=\sqrt{13.4825} \\AB=3.67 km](https://tex.z-dn.net/?f=AB%3D%5Csqrt%7B0.40%5E%7B2%7D%2B3.65%5E%7B2%7D%7D%5C%5CAB%3D%5Csqrt%7B13.4825%7D%20%5C%5CAB%3D3.67%20km)
Therefore the distance between there destination is 3.67 km.
Answer:
a. Horizontal component v = 12 m/s
b. Magnitude of velocity v = 20.78 m / s
Explanation:
Vₓ = 12.0 m / s eastward
β = 30.0 °
So
a.
Vt = Vₐ - Vₓ
Vₐ = 0 i
Vt = 0i - 12.0 = - 12 m/s
b.
Vₙ = 12 / sin (30 °)
Vₙ = 24 m / s
Vₙ = 24 * con (30 °)
Vₙ = 20.78 m / s
Answer:
a) t = 20 [s]
b) Can't land
Explanation:
To solve this problem we must use kinematics equations, it is of great importance to note that when the plane lands it slows down until it reaches rest, ie the final speed will be zero.
a)
![v_{f}=v_{i}-(a*t)](https://tex.z-dn.net/?f=v_%7Bf%7D%3Dv_%7Bi%7D-%28a%2At%29)
where:
Vf = final velocity = 0
Vi = initial velocity = 100 [m/s]
a = desacceleration = 5 [m/s^2]
t = time [s]
Note: the negative sign of the equation means that the aircraft slows down as it stops.
0 = 100 - 5*t
5*t = 100
t = 20 [s]
b)
Now we can find the distance using the following kinematics equation.
![x -x_{o}=(v_{o}*t)+\frac{1}{2}*a*t^{2}](https://tex.z-dn.net/?f=x%20-x_%7Bo%7D%3D%28v_%7Bo%7D%2At%29%2B%5Cfrac%7B1%7D%7B2%7D%2Aa%2At%5E%7B2%7D)
x - xo = distance [m]
x -xo = (0*20) + (0.5*5*20^2)
x - xo = 1000 [m]
1000 [m] = 1 [km]
And the runaway is 0.8 [km], therefore the jetplane needs 1 [km] to land. So the jetpalne can't land
The answer should be copper. hope this helps :D