physics 2.1, 2.2

plastic deformation

object changes shape permanently

elastic deformation

object changes shape temporary

How to calculate gravity on earth

Fg= mass in kg x 9.81

types of forces

applied, friction, normal, gravity, tension, air resistance

equilibrium

when forces balance each other out

extension

number of cm that the length of the spring has increased compared to zero position

spring constant

tells how stiff the spring is

what is the formula for spring constant?

c = f / x

What do the c,f, and x stand for in the formula?

C is spring constant in N/cm, F is force in n, X is extension in cm

How to calculate force using spring constant formula

f = c ⋅ x

How to calculate extension using spring constant formula

x = f / c

When do we use pythagoras?

When the forces are at a 90 degree angle