All categories

2 years ago

Draw a free-body diagram for the ear of a person properly wearing a mask. You may wish to refer to the figure

Physics

1 answer:

Schach [20]2 years ago

5 0

Answer:

Rₓ - F cos θ = 0 , R_y - Fsin θ - W = 0

Explanation:

For this exercise we have a static equilibrium problem,

∑ F =0

In the attachment we have the forces involved, the weight (W) with vertical direction, the force towards the mask (F) and the reaction force of the ear that we will approximate by its vertical and horizontal components (Rₓ and R_y)

Let's use trigonometry to decompose the force F

sin θ = Fₓ / F

cos θ = F_y / F

Fₓ = F sin θ

F_y = F cos θ

we write the equations of equilibrium

X axis

Rₓ - F cos θ = 0

Y axis

R_y - Fsin θ - W = 0

You might be interested in

HELP!!

stepan [7]

Most likely analog signal.
a capacitor, transistor and resistor are only devices used in an electrical circuit. Chaging current or voltage doesn't create devices out of thin air.

6 0

3 years ago

Read 2 more answers

Two cars are travelling in the same direction on a road. The blue car is travelling at 50 m/s in front of the red car, which is

Anestetic [448]

Explanation:

The speed of the red car, relative to the blue car, is:

v = 75 m/s − 50 m/s

v = 25 m/s

6 0

2 years ago

A high-jumper clears the bar and has a downward velocity of - 5.00 m/s just before landing on an air mattress and bouncing up at

Jobisdone [24]

-- As she lands on the air mattress, her momentum is (m v)

Momentum = (60 kg) (5 m/s down) = 300 kg-m/s down

-- As she leaves it after the bounce,

Momentum = (60 kg) (1 m/s up) = 60 kg-m/s up

-- The impulse (change in momentum) is

Change = (60 kg-m/s up) - (300 kg-m/s down)

Magnitude of the change = 360 km-m/s

The direction of the change is up /\ .

8 0

3 years ago

Example of kinetic energey

liubo4ka [24]

Answer:

rolling ball down a hill

Explanation:

A rolling ball has kinetic energy

5 0

2 years ago

Read 2 more answers

An infinite sheet of charge, oriented perpendicular to the x-axis, passes through x = 0. It has a surface charge density σ1 = -2

pishuonlain [190]

Answer:

$E_{total}=4.82*10^6N/C$

vector with direction equal to the axis X.

Explanation:

We use the Gauss Law and the superposition law in order to solve this problem.

Superposition Law: the Total Electric field is the sum of the electric field of the first infinite sheet and the Electric field of the second infinite sheet:

$E_{total}=E_1+E_2$

Thanks Gauss Law we know that the electric field of a infinite sheet with density of charge σ is:

$E=\sigma/(2\epsilon_o)$

Then:

$E_{total}=(\sigma_1+\sigma_2)/(2\epsilon_o)=(-2.7*10^{-6}+88*10^{-6})/(2*8.85*10^{-12})=4.82*10^6N/C$

This electric field has a direction in the axis perpendicular to the sheets, that means it has the same direction as the axis X.

7 0

3 years ago

Read 2 more answers