Speed Velocity Acceleration

Is speed scalar or vector

scalar

Why is speed scalar

it does not involve direction

What is the typical value for walking

1.5 m/s

What is the typical value for running

3 m/s

What is the typical value for cycling

3 m/s

What is the speed at which a person travels at dependent on

age,terrain, fitness and distance travelled

What is the typical value for the speed of sound in air

330m/s

How is speed calculated

speed \= distance / time (s \= d/t)

What is distance measured in

metres (m)

What is speed measured in

metres per second (m/s)

What is time measured in

seconds (s)

What is velocity

the speed of an object in a given direction

Is velocity scalar or vector

vector

Why does motion in a circle involving constant speed mean a change in velocity

Velocity is the speed of an object in a given direction, because the direction is constantly changing this in turn changes the velocity of the object

How can speed be calculated on a straight line distance time graph

the gradient of the line

How can speed be calculated on a accelerating distance time graph

draw a tangent and measure the gradient

How can average acceleration be calculated

acceleration \= change in velocity/time taken (a \= Δv/t)

What is acceleration measured in

metres per second squared (m/s^2)

What is change in velocity measured in

metres per second (m/s)

What is the gradient of a velocity time graph

acceleration

What is the area under a velocity time graph

displacement

How can uniform acceleration be calculated

(final velocity)^2

What is the acceleration of any object falling freely under gravity

9.8m/s

What happens when an object falls through a fluid

it will initally accelerate due to the force of gravity, eventually the resultant force will be zero and the object will move at its terminal velocity