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Motion
Class 9th
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The rate of change of displacement is called
*
speed
velocity
acceleration
distance
A body whose speed is constant then acceleration of this body
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may be zero
must be zero
con't say anything
positive
A vector quantity has
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magnitude
direction
both magnitude and direction
none of these
odometer of a automobile records
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average speed
acceleration
distance
displacement
distance can never be
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positive
negative
zero
both B and C
speedometer of a car measures
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constant velocity
instantaneous speed
acceleration
none of these
on a velocity time graph a horizontal straight line corresponds to motion at
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constant velocity
zero velocity
increasing velocity
decreasing velocity
if the displacement time graph of a particle is parallel to the time axis l, the velocity of the particle is
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unity
infinity
zero
none of these
the slope of velocity time curve gives
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distance
displacement
velocity
acceleration
the numerical ratio of displacement to distance for a moving object is
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always less than one
always grater than one
always less than equal to one
always grater than equal to one
the displacement of an object is proportional to the square of time, then the object moves with
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uniform velocity
uniform acceleration
increasing acceleration
decreasing acceleration
A particle is moving in a circular path of radius 'R' . the displacement after half a circle would be
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2πR
πR
2R
zero
suppose a boy is enjoying a ride on merry go round which is moving with a constant speed of 10m/s. It implies that the boy
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at rest
moving with no acceleration
in accelerated motion
moving with uniform velocity
when the distance travelled by a body is directly proportional to the time, it is travelling with the
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uniform acceleration
non uniform acceleration
constant speed
variable speed
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