Chapter 8-Motion

Displacement

________ may be equal to distance (When body is travelling in straight line) but it can not be more than distance.

Velocity

________ is the term for the quantity that identifies both of these features.

scalar quantity

Speed, which is a(n) ________, is the the rate at which an object travels a distance.Its si unit is m /s (metre /sec)

straight path

The velocity is constant throughout time when an object is travelling uniformly in a(n) ________.

equal intervals

If an object travels in a straight line and its velocity increases or decreases by equal amounts in ________ of time, then the acceleration of the object is said to be uniform.

Initial velocity

________ is denoted by u.

athlete moving

The motion of the ________ along a circular path is, therefore, an example of an accelerated motion.

uniform speed

When an object moves in a circular path with ________, its motion is called uniform circular motion.

vector quantity to measure how fast a body is moving along with is direction is ______

velocity

scalar quantity to measure how fast a mody is moving is ______

speed

in a uniform circular motion _____ is never constant

velocity

_______ can be equal but never more than distance

displacement

______ can be equal but never less that displacement

distance

rate of change of velocity is_____

acceleration

rate of change of distance is ______

speed

a vector quantity has both____ __and__ ______

magnitude and direction

A car starts at rest and travel a distance 20 m in 1 sec .The car average speed is ___________

20m/s

The motion of a free falling body is an example of __________ motion

uniformly accelerated motion

Distance is a _______quantity while displacement is a _____________ quantity

scalar,vector

Motion of earth around sun is an example of __________ motion

uniform circular motion

if position of object doesnt change with time it is said to be at______

rest

rest and motion are ________ to each other

relative

Displacement cannot be _______than distance

more

in a uniform motion speed of object is ________

constant