force

Page 1

force and pressure: chapter 1 physics

what is force? - force is a push or a pull on any object is called force . the use of force requires interaction between at least two objects.

formulas : force - (ma) mass x acceleration

acceleration - change in velocity ___________________ change in velocity = final velocity - initial velocity

time taken for change hence acceleration = final velocity - initial velocity a = v - u by t _______________________________

a= acceleration time taken for change

v = final velocity

u = initial velocity unit of acceleration = SI - m/s powered to 2 or ms powered to -2

t= time CGS unit - cm/s powered to 2 or cms powered to -2

change = delta

Page 2

physical quantity - anything that can be measured= mass , time , length. there are 2 parts in a physical quantity = magnitude and unit - eg 11kg here 11 is the magnitude and kg is the unit