# Motion In A Straight Line

## A particle moves with a non zero initial velocity and retardation , where is the velocity at any time .

A
The particle will cover a total distance
B
The particle comes to rest at
C
Particle continues to move for long time
D
at time
Hard
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## STATEMENT-1: For an observer looking out through the window of a fast moving train, the nearby objects appear to move in the opposite direction to the train, while the distant objects appear to be stationary. STATEMENT-2: If the observer and the object are moving at velocities and respectively with reference to a laboratory frame, the velocity of the object with respect to the observer is .

A
STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is a correct explanation for STATEMENT-1
B
STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1
C
STATEMENT -1 is True, STATEMENT-2 is False
D
STATEMENT -1 is False, STATEMENT-2 is True
Hard
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## A ball is thrown vertically upwards (relative to the train) in a compartment of a moving train. The face of the person sitting inside the compartment is towards engine of the train.

A
The ball will maintain the same horizontal velocity as that of the person (or the compartment) at the time of throwing.
B
If the train is accelerating then the horizontal velocity of the ball will be different from that of the train velocity, at the time of throwing.
C
If the ball appears to be moving backward to the person sitting in the compartment it means that speed of the train is increasing.
D
If the ball appears to be moving ahead of the person sitting in the compartment it means the train's motion is retarding.
Hard
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## The acceleration (a) of a particle is plotted on the Y-axis while the time (t) elapsed is plotted along the X - axis. What does the a - t graph give?

A
The distance covered
B
The difference in velocities
C
The difference in acceleration
D
The difference in force
Hard
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