9-physics

What is density?

• Density tells you how much mass there is in certain area

• Density tells you how much volume there is in a certain mass

• Density tells you how much mass there is in certain volumes

Equation for density

(a)  

Equation for mass?

• m=D x V

• m=D/V

• m=VxD

• m=D x a

• m= D/a

how we measure the volume of water ( name of the instrument)

(a)  

How we find the mass of solid object?

• Using a balance

• Using measuring cylinder

• Using measuring glass

Equation for volume?

• D=m/V

• V=m x D

• V= D/m

• V=m/D

• V=D x m

Equation for volume of the object in the photo

• V=wlh

• V=m/d

• V=wl

• V=a3

How levers work.

• Because some forces produce a turning force

• Because some forces produces a gravitational force

• Because some objects produces friction force

Three main parts of lever

• Effort, fulcrum , force

• Load , force , pivot

• Pivot , force , effort

• Fulcrum, load, pivot

Equation for moment.

• M=F x d

• M=F x s

• M=d x F

• M=s x F