GCSE Physics

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What is the definition of acceleration?

The change in velocity . It has a magnitude and a direction, so it is a vector quantity. Acceleration can be positive or negative and negative acceleration is called deceleration or retardation

What is the definition of velocity?

The speed of something and its direction of travel

Define velocity

This is how fast and in what direction something travels in a straight line an it is measured in m/s or km/h

What is the difference between actual speed and average speed?

actual speed = instantaneous speed, the speed of an object at a given time average speed = the speed averaged over a period of time

How do you calculate acceleration

change in velocity / time taken for change

How do you calculate velocity?

displacement / time taken distance moved in a certain direction / time taken

How do you calculate speed?

distance / time

How do you calculate average speed?

distance travelled / time taken

How do we calculate acceleration?

final velocity - initial velocity / time

What is speed?

how quickly you move from point A to point B

What is the unit used for speed?

m/s

What is velocity measured in?

m/s

What is acceleration measured in

m/s squared

How do we find the gradient?

rise/run

Speed is a _______ quantity

scalar quantity

Define magnitude

size

What is motion?

the process of being moved

What is acceleration?

the rate of change of velocity

What is velocity?

the speed something travels in one, specific direction

Is displacement a scalar or vector quantity?

vector

Velocity is a _________ quantity

vector quantity

What is the difference between speed and velocity?

Speed is how fast you are travelling Velocity is speed in a certain direction

What is the abbreviation for 1. d 2. s 3. t 4. v 5. u 6. a

1. d - distance 2. s - displacement 3. t - time 4. v - velocity/final velocity 5. u - initial velocity 6. a - acceleration

How many meters are in a kilometer?

1000

How many seconds are in an hour?

3600

Define distance

A scalar quantity that refers to how much something has moved

Define displacement

A vector quantity that refers to how far an object has moved from its starting point in a certain direction

Define acceleration

A vector quantity. When an object increases velocity (speeds up), we say that it is accelerating. When an object is slowing down, we say it has negative acceleration, deceleration or retardation.

How do you draw a vector?

As an arrow. The size is represented by the length, the direction is represented by where the arrow points. When we draw them, we must include a reference direction and a scale.

What is the equation for finding average acceleration?

Change in velocity / time taken

Define vector quantities

Have a size (magnitude) and direction

Define scalar quantities

Have a size (magnitude) only

Define speed

How fast something has travelled and it is measured in meters per second or kilometers per hour


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