Physics - Forces and Energy

Secondary 1 Science Physics

This is the force that acts up to support any object on a surface.

Contact Force

The force directed towards the center of any mass.

Gravity

The pull from the Moon's gravity.

Tidal Force

This is the force of gravity on an object.

Weight

This is a kind of frictional force that is caused by a moving object having to push against particles in the air.

Air Resistance

What is the gravitational force of the earth?

10 N/kg

What is weight measured in?

Newtons

What is mass measured in?

Kilograms / kg

Mass is...

the quantity of matter in an object

Mass is ....... even if the strength of gravity changes

constant

Formula to find weight

mass x gravitational force

Formula to find mass

weight ÷ gravitational force

A cloud of dust and gas in space is called....

nebula

How are stars formed?

Stars are formed by nebulas and gas.

Energy is...

the ability to do work

How can energy be used to do something?

Energy can be stored or transferred to be able to do something.

Name the energy forms learned in this chapter.

Kinetic, Chemical, Thermal, Elastic Potential, Gravitational Potential, Sound, Light energy.

The Law of Conservation of Energy states that energy cannot be ....... or ........

The Law of Conservation of Energy states that energy cannot be created or destroyed.

Kinetic Energy is

energy in moving objects

Chemical Energy is

a form of stored energy