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CBSE
Class 9 Science
Motion
Quiz 2
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A particle is travelling with a constant speed. This means
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a. its acceleration is zero
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b. it covers equal distances in equal time intervals
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c. its position remains constant as time passes
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d. it does not change its direction of motion
Which of these is an example of deceleration?
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a. An airplane following a straight path in the sky
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b. car approaching the red light
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c. a rollercoaster moving down a hill
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d. eagle taking off for flight
Speed equals distance divided by
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a. Motion
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b. Velocity
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c. Time
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d. Size
A place or object used for comparison to determine if something is in motion is called
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a. A constant
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b. Velocity
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c. A position
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d. A reference point
The rate at which velocity changes is called
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a. motion
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b. direction
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c. acceleration
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d. speed
Average speed is
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a. The rate at which a slope changes
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b. Equivalent to velocity
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c. The rate at which an object is moving at a given instant
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d. The total distance traveled divided by the total time
When an object's distance from another object is changing.
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a. It has acceleration
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b. It is speeding
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c. It is in motion
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d. It has a high velocity
In circular motion the
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acceleration is zero
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the direction of motion is fixed
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the direction of motion changes continuously
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velocity is constant
The distance-time graph of an object is shown in Figure given below The object
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is at rest
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moves with a constant acceleration
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moves with a constant speed
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moves with a constant velocity
For a particle moving with a constant velocity, the distance-time graph is a straight line.
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True
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False
The area under a speed-time graph is represented by the unit
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$m^2$
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$m^4$
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$m^3$
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$m$
The area under a graph between two quantities is given in unit m/s. The quantities are
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speed and time
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distance and time
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acceleration and time
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velocity and time
The velocity-time graph of a particle is not a straight line. Its acceleration is
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zero
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negative
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variable
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constant
For a particle moving with constant acceleration along a straight line, the velocity-time graph is a straight line.
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True
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False
Scalar quantities can be added according to the rules of arithmetic
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True
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False
If A moves with respect to B then B moves with respect to A
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True
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False
A body is thrown vertically upward with velocity u, the greatest height h to which it will rise is,
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ulg
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ul2g
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(i) and (ii)
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None of the above
Explanation
ul2g
0 h : 0 m : 1 s
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