NCEA Level 1 Physics

What do you do when trying to average a speed on a distance time graph?

Take the overall distance and divide it by the time
V= d/t

What is the unit for acceleration ?

m s-2

What is the unit for speed?

m s-1

What is the unit for power?

Watts (W)

What is the unit for work?

Joules (J)

What is the unit for time?

Seconds (s)

What is the unit for distance?

Metres (m)

What is the unit for force?

Newtons (N)

What is the unit for mass?

Kilograms (kg)

What is the unit for pressure?

Pascals (Pa)

What is the unit for area?

Metres squared (m2)

What is the unit for height?

Metres (m)

What is the unit for any type of energy?

Joules (J)

When calculating the speed an object in motion what equation do you use? Hint- rearrange the kinetic energy equation (Use√)

v=√2c/m

What is the force that pulls an object down?

Weight or gravity

What is the force that pulls an object up?

Reaction force or support force

What is the force that pulls an object forwards?

Reaction force or thrust

What is the force that pulls an object backwards?

Friction or air resistance

Energy stored in objects due to their height above ground.

Gravitational potential energy

Caused by the movement of atoms. Found inside all hot objects.

Heat energy

Energy that is stored in the bonds between atoms. Found in substances such as petrol and food.

Chemical potential energy

Energy of an object due to its motion. For example moving cars, running, swimming, etc.

Kinetic energy

The movement of electrically charged particles. Found in wires, generators and lightning.

Electrical energy

The energy of electromagnetic waves. Found in microwaves, X-rays and visible light.

Light energy

Energy stone in stretched or squashed objects. Examples include springs and rubber bands.

Elastic potential energy

What motion does a straight line on a distance time graph describe?

Stationary

What motion does a curved line going up on a distance time graph describe?

Accelerating

What motion does a curved line going down on a distance time graph describe?

Decelerating

What motion does a steep line on a distance time graph describe?

Higher constant speed

What motion does a line that takes up lots of time and still going up in distance describe on a distance time graph?

Slower constant speed

What does a gradual line (Even time and distance) on a distance time graph describe?

Constant speed

What does a straight line on a speed time graph describe?

Constant speed

What does a gradual line (Even time and speed going up on a speed time graph describe?

Constant acceleration

What does a steep line going up describe on a speed time graph?

Higher constant accerleration

What does a gradual line (Even time and speed going down on a speed time graph describe?

Constant deceleration

What does a steep line going down describe on a speed time graph?

Higher constant deceleration

What do you do when the area under a line consists of a triangle when working out the distance on graph?

1/2 the equation

What is the net force of an object when the forces acting on it are balanced

0

When something is being lifted what formula you can use to figure out the work done when given the height and mass of the object? The... formula

Gravitational potential energy

What is the difference between weight and mass?

Weight is a measure of the gravitational pull on an object. No gravity, no weight whereas mass is constant no matter where you are you always have the same mass.