forces - gravity and weight

Question 1

what is gravity

Answer 1

• a non contact force as the two objects of not have to be touching
• its a vector quantity

Question 2

what does the mass of an object tell us

Answer 2

how much matter the object has

Question 3

what is the unit for mass

Answer 3

kilograms

Question 4

true or false
mass is a vector quantity

Answer 4

false
mass is a scalar quantity as it has no direction

Question 5

do surroundings effect the mass of an object

Answer 5

no

Question 6

what is the weight of an object

Answer 6

the weight of an object is the force acting on it due to gravity

Question 7

what is the unit of weight

Answer 7

Newtons (N)

Question 8

what is different about mass and weight

Answer 8

weight is effected by its surroundings

Question 9

what is the gravitational field strength on earth

Answer 9

9.8N/kg

Question 10

what is the gravitational field strength

Answer 10

a measure of the force of gravity in a particular location

Question 11

what does the gravitational field strength depend on

Answer 11

where you are

Question 12

what is the centre of mass

Answer 12

when the weight of an object can be considered to act at one point