Answer:
a) v_Nort = 2.236 m / s
, θ = 56.3º, b) t= 53.76 s
Explanation:
This exercise should use the addition of vectors, we have a kayak speed of v₁ = 3 m / s and an eastward speed of water v₂ = 2.0 m / s.
They ask us to cross the river that is to the north, we see that the speed of the kayak is the hypotenuse of the triangula, see attached
v₁² = v_nort² + v₂²
v _nort² = v₁² –v₂²
v_nort = √ (3² - 2²)
v_Nort = 2.236 m / s
For the angle we can use trigonometry
tan θ = v₂ / v₁
θ = tan⁻¹ v₂ / v₁
θ = tan⁻¹ 2/3
θ = 33.7º
This angle measured from the positive side of the x axis is
θ = 90 - 33.7
θ = 56.3º
b) we look for the northward component of this speed
sin 56.3 = 
/ v_nort
v_{y} = v_nort sin 56.3
v_{y} = 2.236 sin 56.3
v_{y} = 1.86 m/s
The time is
v_{y} = y/t
t = y/v_{y}
t =100/ 1.86
t= 53.76 s
Answer:
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Explanation:
I did not explain because i got a photo
The answer is B because that that will make it more powerful but less lasting.
He used the quantum mechanic theory to approach light by describing relativity and perspective.
Velocity and acceleration are vector quantities whereas speed, temperature and age are not.
<h3>What is a vector quantity?</h3>
Vector is a quantity that has both magnitude and direction and is represented by an arrow whose direction is same as that of the quantity and length is proportional to the quantity's magnitude.
Vector has magnitude and direction but it does not have position. Velocity and acceleration both are vector quantities as they have magnitude and direction.
If the speed of an object remains same but direction changes then the object is accelerating. It is important to remember that acceleration and velocity aren't always in the same direction.
To know more about vector quantity, refer
brainly.com/question/626479
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