linear kinematics- distance and displacement,speed and ...displacement,speed and velocity,...
TRANSCRIPT
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LINEAR KINEMATICS- distance and displacement,speed and velocity,
Acceleration
A Presentation
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DISTANCE: Distance refer to a physical length . when body
moves from one location to another, the length of the path that the body follows is the distance , e.g. when a runner completes 2 laps around a 400m track , the distance that the runner has covered is equal to (400+400) 800m •Distance is a scalar quantity • It only has magnitude
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DISPLACEMENT: It is change in position.displacement is the shortest distance from the initial position to the final position of a point.it is measured in a straight line.e.g. in the completetion of a lap around the 400m track,the displacement is zero because the starting and finishing positions are the same. •Vector quantity •Both magnitude and direction
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Units of distance and displacement are Foot millimeter(mm)is 1/1000m, centimeter(cm) is 1/100m, and kilometer(km) is 1000m.
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speed
l=length of path t=time ∆=delta(or)change in time s=average speed
•Speed is a scalar quantity •Units are Miles/hour , meters/second,feets/second
Speed is the rate at which an object covers distance.
It is defined as the distance covered , divided by the
time taken to cover it.
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VELOCITY
Velocity is the change in position or the displacement that occurs during a given period of time.
v= velocity d=displacement t=time ∆=delta(or)change in time
•Velocity is a vector quantity,as it has magnitude and direction •Unit are meters/second
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❑:- The rate of change of velocity is called acceleration. • May be positive may be negative. a= v/t or a = d/t2 = m/sec2 unit
ACCELERATION
•Positive acceleration:the final velocity(v2) will be greater than initial velocity(v1) •Negative acceleration: the final velocity(v2) will be less than initial velocity(v1) [deacceleration ]
•Unit are meters/second2
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Q1. Dispacement is a vector quantity.
(A). TRUE
(B). FALSE
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Q2. Vector quantity only has Direction.
(A). TRUE
(B). FALSE
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Q3. Distance is a Scalar Quantity.
(A). TRUE
(B). FALSE
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Q4.Accelaration is the rate of change
of_____.
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Q5. Scalar has only ______
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• Q6. Scaler quantity only has magnitude.
(A). TRUE
(B). FALSE
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Q7.
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Q8.
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Q9.
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Q10.
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Q12. Different between distance and displacement
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Q12. Speed is defined as the rate of change of
distance.
(A). TRUE
(B). FALSE
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Q13.Different between speed and velocity
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Q14. Velocity is a vector quantity.
(A). TRUE
(B). FALSE
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Q15.Speed is a vector quantity
(A). TRUE
(B). FALSE
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