It is used to reduce the friction
The following formula gives the connection between the force, the mass and the acceleration:
F=ma
In our case we know the force and the mass. F=20N and m=10kg
a=F/m
a=20m/s^2/10=2<span>m/s^2</span>
Answer:
Fm= 91.88 N
Explanation:
Pascal principle
The pressure acting on one side is transmitted to all the molecules of the liquid because the liquid is incompressible.
The pressure is definited like this:
P=F/A
Where:
P: Pressure in pascals (Pa)
F: Force acting in the area (N)
A : Area where the force acts (m²)
Pascal principle
Pm=Ps
Fm/ Am= Fs/ As Formula (1)
Where :
Pm : Pressure on the master piston
Ps : Pressure on the slave piston
Fm : Force on the master piston (N)
Fs: Force on the slave piston ((N)
Am: master piston area (m²)
As: slave piston area (m²)
Area Formula (A)
A= π*R²
R : piston radius
Calculation of the weight of the car (W)
W= m*g= 2400 kg*9.8m/s²= 23520 N
W = Fs
Data
Fs = 23520 N
Dm = 1.5 cm
Ds = 24 cm
Rm = 0.75 cm
Rs = 12 cm
Am = π*Rm² = π*(0.75)²
As = π*Rs² = π*(12)²
Force exerted on the master cylinder
We replace data in the formula (1)
Fm= 91.88 N
Given:
v(final velocity)= 7.5 m/s
t(time taken to pedal along)=4.5 s
Displacement (s)=19 m
Now we know that
s=ut+1/2(at^2)
Where s is the displacement measured in m
u is the initial velocity measured in m/sec
a is the acceleration measured in m/s^2.
t is the time taken to cover this distance.
Substituting the given values in the above formula we get
19= 4.5u+1/2(a x 4.5 x 4.5)
20.25 a + 9 u = 38
Now we also know that
v= u + at
Substituting the given values in the above formula we get
7.5= u + 4.5a
Solving for u and a from the above equations we get
u = 0.944m/s
a= 1.45 m/s^2
Thus the initial velocity is 0.944 m/s
NoseIt - is a protuberance in vertebrates that houses the nostrils, or nares, which admit and expel air for respiration. It also houses the nosehairs, which catch airborne particles and prevent them from reaching the lungs. Within and behind the nose there is the olfactory mucosa and the sinuses.
turbinate(or nasal concha)- is a long, narrow and curled bone shelf (shaped like an elongated sea-shell) which protrudes into the breathing passage of the nose. The turbinates divide the nasal airway into three groove-like air passages -and are responsible for forcing inhaled air to flow in a steady, regular pattern around the largest possible surface of cilia and climate controlling tissue.
Sinus- A sinus is a sack or cavity in any organ or tissue, or an abnormal cavity or passage caused by the destruction of tissue.
Paranasal- Paranasal sinuses are air-filled spaces, communicating with the nasal cavity, within the bones of the skull and face The paranasal sinuses are joined to the nasal cavity via small orifices called ostia.
Pharynx-The section of the alimentary canal that extends from the mouth and nasal cavities to the larynx, where it becomes continuous with the esophagus.
Larynx- Voice box
Epiglottis- The thin elastic cartilaginous structure located at the root of the tongue
Trachea-A thin-walled, cartilaginous tube descending from the larynx to the bronchi and carrying air to the lungs. Also called windpipe.
Bronchi-The two main brances of the trachea, leading directly to the lugns.
Bronchiole-The fine, thing-walled, tubular extensions of a bronchus.