all formulas of physics class 9
Answers
Answer:
Acceleration Formula:
Acceleration is defined as the rate of change in velocity to the change in time. It is denoted by symbol a.
a =\frac{v-u}{t}
t
v−u
where,Average Speed Formula:
The average speed is the average of speed of a moving body for the overall distance that it has covered.
S = \frac{d}{t}
t
d
Where,According to Newton’s second law of motion, the force can be expressed by the product of mass and acceleration of the body.
F = m × a
Where,
F Force
m Mass of the body
a Acceleration in velocity available
5) Power Formula:
The capacity to do some work is termed as Energy. The Energy spent to do work in a unit amount of time is termed as Power.
P=\frac{W}{t}
t
W
Where,
P Power
W Work done
t Time taken
6) Weight Formula:
Weight is not anything but the force which an object experiences due to gravity.
W=mg
Where,
W Weight
m Mass of the body
g Acceleration due to gravity
7) Pressure Formula:
The pressure is defined as the amount of force applied per unit area of the object.
P=\frac{F}{A}
A
F
Where,
P Pressure
F Force applied
A Total Area of the object
8) Kinetic Energy formula:
Kinetic energy is the energy that is possessed by a body due to its state of motion.
E = \frac{1}{2}mv^2
2
1
mv
2
Where,
E Kinetic Energy
m Mass of the body
v The velocity with which the body is traveling
9) Ohms Law Formula:
Ohms law says that the current running through some conductor material is directly proportional to the potential difference between two endpoints of the conductor.
V= I × R
Where,
V Voltage measured in Volts
I Electric current flowing through the conductor in amperes.
R The resistance of the material in ohms.
10) Frequency Formula:
Frequency is the revolutions completed per second or as the number of wave cycles.
f= \frac{V}{\lambda}
λ
V
Where,
f Frequency of the wave
V Velocity or wave speed
\lambdaλ The wavelength of the wave
Answer:
First Equation of Motion: (Velocity-Time Relation) v = u +at. Where, v = Final velocity of body. u = Initial velocity of body. a = Acceleration. And t = Time. Derivation: Using formula for acceleration: ...
Second Equation of Motion: (Position-Time Relation)
Third Equation of Motion: