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Answers
picture 1st
answer 1. (a) Scalars are quantities that are fully described by a magnitude (or numerical value) alone.
(b) Vectors are quantities that are fully described by both a magnitude and a direction.
answer 2. as object equal distance in equal interval of time it is said to be uniform motion whereas if a body covers unequal distance in equal interval of time or an equal distance in unequal interval of time it is said to be non uniform motion
answer 3.yes in object which has moved through a distance can have zero displacement example when a person walking along a circular path return back to the starting point after completing a circle his displacement is zero but he covers a distance to payaar where r is the radius of circular path the displacement is zero is the shortest distance between the initial and final position of the person is zero.
answer4. 1. speed is the rate of change of distance between velocity is the rate of change of displacement in a specified direction
2.speed is a scalar quantity but velocity is a vector quantity
answer5. speed =distance /time
=200m/25sec
=8m/sec
answer6. velocity=displacement /time
=150m/10sec
=15m/sec
picture 2nd
answer1. when a body is moving it is said to be in motion .ex. a moving car
answer2. when a body stay at a place or said to be as not moving it is said to be at rest .ex. electrical pole
answer3 . refrence point or origin is tge point from where a body starts moving .
answer4. distance - it is defined as the actual path covered by a body . it is a scalar quantity full stop it can never be negative or zero. distance can be equal to or greater than displacement
displacement - it is the shortest distance between two points by between which the body moves it is a vector quantity. it can be negative zero positive positive displacement can be equal to or less than displacement
answer5. i) A body moving in a straight line path can have displacement and distance equal
ii) when a person walking along a circle pass returns back to the starting point after completing a circle is displacement is zero but he covers the distance to payaar where r is the radius of the circular path the displacement is zero as the shortest distance between the initial and final position of person is
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