Kinematics Flashcards
what is the si unit for distance?
metres (m)
is distance a scalar or vector quantity?
scalar quantity
what is distance?
it is total length covered in an journey irrespective of direction of the motion
what is displacement?
the distance in a straight line from the starting point to the ending point in a specific direction
is displacement a scalar or vector quantity?
vector quantity
what is speed?
it is the distance travelled per unit time
is speed a scalar or vector quantity?
scalar quantity
what is the formula for speed?
speed=distance/time
what is velocity?
it is the rate of change of displacement
is velocity a scalar or vector quantity?
vector quantity
what is the formula for velocity?
velocity=displacement/time
what is a negative velocity?
it means that the object is moving in the opposite direction
what is average speed?
the total distance travelled by the object divided by the total time taken during the journey of an object
what is acceleration?
it is defined as the rate of change in velocity
what is average acceleration?
it is defined as the change of velocity per unit time
what is the unit for acceleration?
ms -2 or m/s2
what is the formula for acceleration?
a= v-u / t
what happens when an object moves at a constant speed without changing its direction?
it has zero acceleration
what is used to describe an object slowing down?
retardation or deceleration
if a car is moving at constant speed along a circular track, is the car accelerating?
yes, car is moving at constant speed but direction is changing so velocity is not constant so have acceleration
how to find the distance travelled by an object through a speed time graph?
the area under the graph
