Mass and weight and Density

Question 1

Weight and mass differences

Answer 1

Your mass is unchanged whether your on mars or earth whereas weight is a gravitational force on an object

Weight, the effect of gravitational field on a mass
Mass, how much matter is in an object

Question 2

Weight equation

Answer 2

Mass x gravitational field strength

Question 3

How to predict whether it will float in water

Answer 3

The density of water is 1g/cm^3
If the density is lower it will float, vice versa

Question 4

Find the density of a liquid

Answer 4

Measure the mass of the measuring cylinder by putting in on a balance
Fill the liquid and measure new mass

New mass - old mass = mass of the liquid

The volume can be read on the cylinder

Question 5

Find the volume of a solid

Answer 5

Measure the volume of the solid

If the solid is regular shape find the volume by using a ruler to measure the dimensions
If the solid is irregular then immerse it with water and measure the volume of the water when risen

New liquid volume - old liquid volume

Find the density using equation

Question 6

Density formula and definition

Answer 6

Density = mass/volume

(Kg/m^3)

Density definition - mass per unit volume

Question 7

Inertia

Answer 7

Resistance to change in motion
The larger the mass to harder to change its motion
(Cant immediately stop a heavy truck)