Physics-
General
Easy
Question
If the velocity
of a particle moving along a straight line decreases linearly with its displacement
from 20
to a value approaching zero
m, then acceleration of the particle at
m is

The correct answer is: 
Slope of line 
Equation of line is 
(i)
Velocity at 

Differentiate Eq. (i) with respect to time,
acceleration 

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The graph of displacement
time is Its corresponding velocity-time graph will be

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time is Its corresponding velocity-time graph will be

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The displacement-time graph of moving particle is shown below The instantaneous velocity of the particle is negative at the point

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A body begins to walk eastward along a street in front of his house and the graph of his position from home is shown in the following figure. His average speed for the whole time interval is equal to

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In a
, H is the orthocentre and D is the mid point of
Segment HD is produced to T such that HD=DT. Then the ratio
equals to ;
Hence 2:1 is the correct option
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, H is the orthocentre and D is the mid point of
Segment HD is produced to T such that HD=DT. Then the ratio
equals to ;
Maths-General
Hence 2:1 is the correct option
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In 
In 
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One quarter sector is cat from a uniform circular disc of radius R. This sector has mass M. It is made to rotate about a line perpendicular to its plane and passing through the center of the original disc. Its moment of inertia about the axis of rotation is...

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In ΔABC , 4Rcos
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=
In ΔABC , 4Rcos
cos
cos
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A circular disc of radius R and thickness R/6 has moment of inertia about an axis passing through its center and perpendicular to its plane. It is melted and re casted in to a solid sphere. The moment of inertia of the sphere about its diameter as axis of rotation is.
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A ring of mass M and radius r is melted and then molded in to a sphere then the moment of inertia of the sphere will be.....
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