mass and weight

Question 1

Mass is

can be measured using

unit

symbol

Answer 1

the amount of matter in an object.

mass balance

m

kg

Question 2

Weight (measured in)

symbol

measured using a

it is a …. force

Answer 2

Weight (measured in newtons, N) is the force of gravity acting on a mass.

newtons, N

W

gravitational

newton meter or spring balance

Question 3

The size of weight depends on

Answer 3

the gravitational field strength

Question 4

weight equation

Answer 4

mass x gravitational field strength

W = m x g

Question 5

The value of g (the gravitational field strength) varies from

Answer 5

planet to planet

Question 6

On Earth: g is

Answer 6

10 N / kg

Question 7

The weight (and hence mass) of two objects can be compared using

Answer 7

a balance.

Question 8

Answer 8

Question 9

If mass is given in grams, you might need to convert to kilograms by

Answer 9

dividing the mass by 1000.

Question 10

When referring to the force of gravity:

be careful to call it

Answer 10

weight , gravitational force or gravitational attraction.

Don’t refer to it as just gravity – and certainly don’t call it gravitational field strength or gravitational potential (both of which mean different things).

Question 11

Mass has two significant effects in Physics

Answer 11

The mass of an object opposes any attempt to change that object’s motion.
The greater the mass of an object, the more difficult it is to speed it up, slow it down or change its direction.
This property of mass is sometimes referred to as inertia.

Mass is also the source of an object’s weight – the force of gravity on a mass.
The greater the mass, the greater the weight.

remember: mass is not affected by strenght of gravity

Question 12

gravitational field strenght is

symbol

unit

Answer 12

weight per unit mass

g

newton per kg

Question 13

the weight of an object is proportional to its if mass doubles, weight

Answer 13

doubles

mass