Physics, 05.10.2019 18:20 alexandroperez13

Acar is driven 225 km west and then 98 km southwest (45).

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Sum the vector components: Dx = 225* Cos(180)+ 78*Cos(225)= -280.154 km Dy = 225* Sin(180)+ 78*Sin(225) = -55.154 km displacement: Sqrt(Dx^2+Dy^2) = 285.532 km Arctan(Dy/Dx) = 191.137degrees CCW OR: 11.137 degrees South of West

Answer from: hannahmxx2

Displacement of the car is about 302 km at 13° south of westFurther explanation

Acceleration is rate of change of velocity.

$\large {\boxed {a = \frac{v - u}{t} } }$

$\large {\boxed {d = \frac{v + u}{2}~t } }$

a = acceleration ( m/s² )

v = final velocity ( m/s )

u = initial velocity ( m/s )

t = time taken ( s )

d = distance ( m )

Let us now tackle the problem !

Given :

d₁ = 225 km west

d₂ = 98 km southwest

Unknown :

displacement = d = ?

Solution :

$d^2 = (d_1)^2 + (d_2)^2 + 2d_1d_2\cos 45^o$

$d^2 = (225)^2 + (98)^2 + 2(225)(98)\frac{1}{2}\sqrt{2}$

$d^2 = 60229 + 22050 \sqrt{2}$

$\large {\boxed {d \approx 302 ~km} }$

$\cos \theta = \frac{(d_1)^2+d^2-(d_2)^2}{2d_1d}$

$\cos \theta = \frac{225^2+302^2-98^2}{2(225)(302)}$

$\cos \theta \approx 0.974$

$\large {\boxed {\theta \approx 13^o} }$

Conclusion :Displacement of the car is about 302 km at 13° south of westLearn moreVelocity of Runner : Kinetic Energy : Acceleration : The Speed of Car : Answer details

Grade: High School

Subject: Physics

Chapter: Kinematics

Keywords: Velocity , Driver , Car , Deceleration , Acceleration , Obstacle , Speed , Time , Rate

Acar is driven 225 km west and then 98 km southwest (45).

Answer from: Quest

the answer would be 32*f

Answer from: Quest

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

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