Science HN

Mass is measured in what?

Grams, kilograms ect.

Mass definition

The amount of substance/matter in an object

What is matter/what is matter made of?

Atoms

Is mass affected by gravity?

No

As the mass ____ the acceleration ___.

As the mass INCREASES the acceleration DECREASES.

Newtons are the measurement of what?

Force, gravity, and weight

Acceleration solution

m/s2

Gravity definition

The attraction between 2 masses

Definition of weight

The gravitational pull on an object

Does weight change?

Yes. Example: being on earth then going to the moon

Motion meaning

A change in position over time

Balanced meaning

No movement or continuous movement

Net force meaning

The sum of all forces on an object

Force meaning

A push or a pull on an object in a certain direction

what’s is force represented by?

arrows

Unbalanced meaning

speeding up or slowing down or starting or stopping (a change in motion)

Unwanted direction

friction

Friction meaning

A force that opposes motion between 2 surfaces of objects that make contact

Helpful friction

Example: making a fire, rosining a bow ect.

unhelpful friction

bike chain rubbing together which causes chain to wear away

Newtons first law

Inertia- an object in motion will stay in motion unless acted on by an outside force.

Newtons second law

F=ma- force is equal to mass times acceleration

Newtons third law

Action reaction- an action will have an equal and opposite reaction

Acceleration meaning

Change in speed over change in time

what does 0 sorta stand for?

It stands for balanced since there’s nothing happening

two arrows that are equal to each other are?

they are balanced because nothing happens

How much force is the wall pushing back?

10N, because the wall and the boy aren’t moving this is also a balanced force.

I’m pushing the box which is being shown with the red arrow, which arrow shows friction?

Arrow D shows friction, because friction opposes movement.

What’s velocity?

Velocity is speed + direction

Is this person changing velocity?

Yes, because they’re going in a circle they’re changing direction

True or False? Acceleration only exists when there’s a change in velocity.

True

How do you calculate distance?

speed x time

What is energy?

It’s the ability to do work or to cause change

Potential energy meaning

Stored energy

What are examples of potential energy?

A raised object, A drawn bow etc.

True or false? Changing the “y” axis of an object is potential energy.

True such as raising a book of the ground

Kinetic energy meaning

active energy

What are examples of kinetic energy?

A person walking, a moving car, etc.

True or False? Energy can be created and be destroyed.

False, it can only transform from one form to another.

Is mechanical energy P or K?

Both

Is Radiant energy P or K?

Kinetic

Is Chemical energy P or K?

Potential

Is Electrical energy P or K?

Kinetic

Is Nuclear energy P or K?

Both

Is Thermal energy P or K?

Kinetic

Thermal energy is what?

It’s heat

Examples of thermal energy

Fire, a hot cup of coco etc.

Thermal Energy is the biggest loser of all the energy’s. True or False?

True, because it’s the lowest point of energy

Nuclear energy is what?

Fusion or fission

Fusion means?

To fuse (combine)

Fission means?

To split

Examples of nuclear energy

The sun is constantly going under nuclear fusion

Electrical energy is what?

It’s moving electrons

Examples of electrical energy

Wires, power outlet, etc.

Chemical energy is what?

It’s the bond between tiny parts of molecules

Examples of chemical energy

Coal, your body converting food into energy, batteries, etc.

Radiant energy is what?

It’s the movement of light

Examples of radiant energy

Sun’s rays, car keys, x-rays, etc.

Mechanical energy is what?

It’s when an object is moving or in position

Examples of mechanical energy

running, writing, etc.

What are the types of energy being shown?

Chemical, electrical, radiant and a little bit of thermal

When you heat up food in a microwave there is thermal energy being shown, how?

because the molecules of the food are vigorously vibrating which heats up your food

At which point does the diver have the least amount of potential energy?

4

At which two points is the potential energy most likely the same?

1 and 3

Speed meaning

Change in the position of an object per unit m/s

Time meaning

Measures the duration of an event

Distance

How far an object travels from its starting point