Velocity and weight Flashcards
What are speed and velocity measured in?
M/s
What is the difference between speed and velocity?
Speed is just how fast you’re going but velocity also specifies the direction.
Distance time graph... Straight diagonal line going up hill = Flat line horizontally = Steepening Smooth positive curve... sloping off = Straight diagonal line down hill = Line back to 0 =
Steady Speed Stopped Accelerating, decelerating Steady speed Return of the object to the starting point
Speed =
Distance / time
What does the gradient of a distance time graph show you?
Why?
How fast the object is travelling
Because the gradient is the change in distance (vert axis) / by the change in time (hor axis)
Gradient shows the … on a distance time graph
Speed
The steeper the graph the…
faster it’s going
What is acceleration?
How quickly velocity is changing. The speed or direction could change.
Acceleration = ... / ... (m/s/s = m/s2)
Change in velocity / Time taken
v-u / a x t
Velocity time graphs... Gradient = Flat sections are = The steeper the graph the = Uphill sections are = Downhill sections are = The area under any section of the graph, or all of it, is equal to... = A curve means =
Acceleration Stead speed greater the acceleration or deceleration acceleration deceleration distance traveled in that time interval a changing acceleration
Acceleration = gradient =
vertical change / horizontal change
What is gravitational force?
The force of attraction between all mases
What are the two effects of gravity on the planet?
It makes all things accelerate towards the ground, at g, 10m/s
It gives everything a weight
What is the mass?
The amount of stuff in the object, it will be the same everywhere.
What is weight caused by?
The pull of the gravitational force. The weight is the force of gravity pulling it towards the centre of the earth
