Gravity, mass and weight

Question 1

Mass

Answer 1

Amount of stuff in an object, will have same value anywhere in the universe. it is scaler

Question 2

weight

Answer 2

force acting on object due to gravity, close to earth, this force is caused by gravitational field around earth.
force measured in newtons, think of acting from single point, called centre of mass.
measured using newton meter.

Question 3

gravity

Answer 3

pull of gravitational force on object

Question 4

Equation for weight

Answer 4

You can calculate if you know it mass, and strength of gravitational field.
Weight(N)=mass(kg)x gravitational field strength

Question 5

gravitational field strength

Answer 5

this varies with location, this means weight can change within location