formulas of chapter 9 of science force and law of motion
Answers
Speed : where v is speed in metres per second, s is distance in metres, and t is time in seconds .
Velocity : where v is velocity in metres per second, d is displacement in metres, and t is time in seconds .
Acceleration : where a is acceleration in m/s2, v is change in velocity in metres per second, and t is time in seconds .
Weight : W = mg
where W is weight, m is mass in kilograms and g is acceleration due to gravity in m/s2
(on Earth, acceleration due to gravity is approximately 9.8 m/s2)
Force : F = ma
where F is force in newtons, m is mass in kilograms, and a is acceleration in m/s2
Work Done : W = Fs
where W is work in joules, F is force in newtons, and s is the distance over which the force is applied
Gravitational Potential Energy
GPE = mgh where GPE is gravitational potential energy in joules, m is mass in kilograms, g is the acceleration due to gravity in m/s2, and h is height in metres (on Earth, acceleration due to gravity is approximately 9.8 m/s2)
Elastic Potential Energy
EPE = kx2
where EPE is elastic potential energy in joules, k is the spring constant of the object, and x is the length of extension or compression in metres
Power : P = W /t
where P is power in watts, W is work in joules, and t is time in seconds
Mechanical Advantage : where MA is the mechanical advantage and the load and effort are measured in newtons
or
where both distances are measured in metres in a first or second class lever
V = u+at
P= mv
F= ma
F= P2-P1/t1-t2
F= mv2-mv1/t2-t1
I= F*t
Here V is final velocity, u is initial velocity, a is acceleration, t is time, p is momentum , m is mass , and I is impulse
Hope It will help you.