Studied by 9 peoplevelocity formula
The formula for velocity is:
velocity = displacement / time
where displacement is the change in position and time is the duration of the displacement. Velocity is a vector quantity, meaning it has both magnitude (speed) and direction.
Acc
acceleration formula
The formula for acceleration is:
a = (vf - vi) / t
where a is acceleration, v_f is final velocity, v_i is initial velocity, and t is time.
gradient formula
The formula for calculating a gradient is:
Gradient = (Change in y) / (Change in x)
where y and x are the vertical and horizontal changes, respectively.
hookes law
Hooke's Law states that the force needed to extend or compress a spring by some distance is proportional to that distance. Mathematically, it can be expressed as F = -kx, where F is the force applied, x is the displacement of the spring from its equilibrium position, and k is the spring constant.
pressure
Pressure = Force / Area
pressure in liquid = (density)(gravity)(height)
pressure in a gas = p1v1=p2v2
force formula
The formula for force is:
F = m x a
where F is the force, m is the mass of the object, and a is the acceleration.
moments formula
The formula for calculating moments is:
M = F * d
Where M is the moment, F is the force applied, and d is the perpendicular distance from the force to the pivot point.
conditions of equilibrium
Conditions of Equilibrium:
For an object to be in equilibrium, the following conditions must be met:
The net force acting on the object must be zero.
The net torque acting on the object must be zero.
momentum formula
The formula for momentum is:
p = mv
where p is momentum, m is mass, and v is velocity.
impulse formula
The formula for impulse is given by:
m(v-u)= FΔt
where m(v-u) is the impulse, F is the force applied, and Δt is the time interval during which the force is applied.
conservation-of momentum
pi=pf
mu+mu=mv+mv
Kinetic energy
1/2 m v2
Potential energy
mgh
power formulas
p=e/t
p=IV
p=I2V
Efficiency
out/in x 100
Density
m/v
specific heat capcaity
e=mcΔt
c=e/mΔ t
latent hear
e=ml
l=e/m
velocity of wave
fxλ
echo
2d/t
speed of sound in air
344
speed of sound in water
1400ms
speed of sound in concrete
5000ms
snells law
n1sinΘ1=n2sinΘ2
bending of colours
red bends less violet bends more
refractive index
n=c/v
Note
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