Gravity, Mass and Weight

Question 1

What is gravity?

Answer 1

Gravity is a force between all objects

Question 2

What affects the size of the force that gravity has?

Answer 2

• the mass of the objects; the bigger the object, the bigger the force
• the distance between objects

Question 3

What is mass and what is it measured in?

Answer 3

Mass is the amount of matter in an object.

Measured in Kg, smaller masses in g, larger masses in T

Question 4

What is weight and what is it measured in?

Answer 4

Weight is the name given to the force of gravity on an object.
Measured in Newtons (N)

Question 5

What is the difference between mass and weight?

Answer 5

Mass is the amount of material contained in a body, measured in Kgs.
Weight is the force exerted by gravity on that object, measured in N

Question 6

The gravitational field strength on Earth is around 10N/kg. What is your weight if your mass is 45 kg?

Answer 6

W = m*g
W = 45 x 10
W = 450 N