3.1 Motion Flashcards
How is average velocity calculated?
v=d/t (velocity=displacement/time)
whats the difference between distance and displacement
distance has no direction whereas displacement does
how can you determine velocity from a displacement-time graph
the gradient
is velocity a vector or a scalar quantity
Vector
whats the difference between speed and velocity
speed only has magnitude whereas velocity also has a direction
define acceleration
the rate of change of velocity
define velocity
the rate of change of displacement
what are the units for velocity
ms-1
what are the units for acceleration
ms-2
how can acceleration be calculated
a=v/t (acceleration= velocity/ time)
is acceleration a scalar or vector quantity
vector
how can acceleration be determined from a velocity-time graph
the gradient
how can displacement be determined from a velocity-time graph
the area under the line
what kind of motion can suvat equations be used for
vector with uniform acceleration
state the 4 suvat equations
v=u+at
s=1/2(u+v)t
s=ut+1/2at^2
v^2=u^2+2as
what is meant by free fall
a motion of an object where gravity is the only force acting upon it
what is the value of acceleration of free fall on earth
9.81ms-2
define stopping distance of a car
the distance the car travels before coming to a stop
what two components does stopping distance consist of
thinking distance and breaking distance
define thinking distance
the distance the car travels whilst the driver is thinking
define breaking distance
the distance the car travels whilst under breaking
how can thinking distance be calculated
speed x reaction time
