Topic P5 - Forces - Weight, Mass And Gravity

Question 1

What two things does gravity do?

Answer 1

• On the surface of a planet, it makes all things fall towards the ground
• It gives everything a weight

Question 2

What is mass?

Answer 2

Mass is the amount of ‘stuff’ in an object. For any object it will have the same value anywhere in the universe.

Question 3

What is weight?

Answer 3

Weight is the force acting on an object due to gravity. This force is caused by the gravitational field around the earth.

Question 4

What is gravitational field strength?

Answer 4

It varies between location and it is stronger the closer you are to the mass causing the field, and stronger for larger masses.

Question 5

What is weight measured in?

Answer 5

Weight is a force measured in Newtons and with a newton meter.

Question 6

What is mass measured in?

Answer 6

Mass is not a force and is measured in kilograms.

Question 7

How to calculate weight…

Answer 7

You can calculate weight of an object if you know its mass (m) and the strength of the gravitational field that is in (g)

Question 8

Weight equation is…

Answer 8

Weight (N) = Mass (kg) x Gravitational Field Strength (N/kg)