Kinematics flashcards

Define displacement

distance measured in a straight line (from start to end point)

Define distance

total length covered by an object regardless of the direction of motion

Define speed and what’s the formula?

distance moved per unit time.
V = d/t

Define velocity and state its formula

rate of change of displacement
V = d/t (*d = displacement)

What is the difference between speed and velocity?

Speed: regardless of direction, always positive

Velocity: depends on direction of motion, can be negative or positive

Define acceleration and state the formula

rate of change of velocity over time.

Formula: a = v-u/t

Is from rest initial or final velocity? Then what is to rest?

from rest: initial (u)

to rest: final (v)

What is distance-time graph?

y axis - distance

x -axis - time

What is the speed and gradient for this graph?

Name of graph?

speed: zero

gradient: zero

object is at rest

What is the speed and gradient for this graph?

Name of graph?

speed: constant

gradient: constant

travelling at uniform acceleration

What is the speed and gradient for this graph?

Name of graph?

speed: increasing non-uniformly

gradient: increasing gradient

travelling increasingly at non-uniform acceleration

What is the speed and gradient for this graph?

Name of graph?

speed: decreasing non-uniformly

gradient: decreasing gradient

travelling decreasingly at non-uniform speed

What is speed-time graph?

y axis - speed/velocity

x axis - time

What is the acceleration and gradient of this graph?

Name of graph?

accelration : zero as speed is constant

gradient: zero

travelling at uniform speed

What is the acceleration and gradient of this graph?

Name of graph?

acceleration: constant

gradient: constant

travelling with increasing uniform acceleration

What is the acceleration and gradient of this graph?

Name of graph?

acceleration: constant deceleration

gradient: constant negative gradient

travelling with constant deceleration

What is the acceleration and gradient of this graph?

Name of graph?

accelaration: increasing non-uniformly

gradient: positive & increasing

travelling with increasing acceleration

What is the acceleration and gradient of this graph?

Name of graph?

acceleration: decreasing non-uniformly

gradient: positive & decreasing

travelling with decreasing acceleration

How to find distance through speed-time graph?

To find distance, calculate the area under the speed-time graph. use the formula of a trapezium: ½ x (a + b) x h

What is acceleration free fall?

Acceleration due to gravity acting on an object in free fall, 10 m/s² on Earth.

Why do object fall?

Due to gravity with no air resistance.

What does this graph show?

when object is in mid-air

what does this graph show? what does the blue arrow mean?

when object is thrown vertically upwards. the blue arrow shoes the highest point of the object