(B) When the boy drops the apple,it possesses the same horizontal velocity as the train at that instant due to inertia of motion.Since the train is ju

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Slightly away from the hand of his brother in the direction of motion of the train

(B) When the boy drops the apple,it possesses the same horizontal velocity as the train at that instant due to inertia of motion.Since the train is just about to stop,it is undergoing retardation (deceleration).As the apple falls,its horizontal velocity remains constant (neglecting air resistance),while the train's velocity decreases due to the retardation.Consequently,the apple covers more horizontal distance than the brother sitting in the train during the time of its fall.Therefore,the apple will fall slightly away from the hand of his brother in the direction of motion of the train.

Class 11 Physics Motion in Straight Line Relative Motion in One Dimension

Easy

$A$ boy sitting on the topmost berth in the compartment of a train which is just going to stop at a railway station,drops an apple aiming at the open hand of his brother sitting vertically below his hands at a distance of about $2 \ m$. The apple will fall:

A
Precisely on the hand of his brother
B
Slightly away from the hand of his brother in the direction of motion of the train
C
Slightly away from the hand of his brother in the direction opposite to the direction of motion of the train
D
None of the above

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Motion in Straight Line

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Relative Motion in One Dimension

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$A$ car is standing $200\, m$ behind a bus,which is also at rest. The two start moving at the same instant but with different forward accelerations. The bus has an acceleration of $2\, m/s^2$ and the car has an acceleration of $4\, m/s^2$. The car will catch up with the bus after a time of:

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$A$ train is moving at a constant speed $V$. When its driver observes another train in front of him on the same track and moving in the same direction with constant speed $u$. If the distance between the trains is $x$,what should be the minimum retardation of the train to avoid a collision?

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$A$ boy sitting on the topmost berth in the compartment of a train which is just going to stop at a railway station,drops an apple aiming at the open hand of his brother sitting vertically below his hands at a distance of about $2 \ m$. The apple will fall:

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$A$ train is running at a constant speed of $90 \,km/h$ on a straight track. $A$ person standing on the top of a bogie moves in the direction of motion of the train such that he covers $1 \,m$ on the train each second. The speed of the person with respect to the ground is .........

Two cars $A$ and $B$ are travelling in the same direction with velocities $v_1$ and $v_2$ $(v_1 > v_2)$. When car $A$ is at a distance $d$ ahead of car $B$,the driver of car $A$ applies the brake,producing a uniform retardation $a$. There will be no collision when:

$A$ car is standing $200\, m$ behind a bus,which is also at rest. The two start moving at the same instant but with different forward accelerations. The bus has an acceleration of $2\, m/s^2$ and the car has an acceleration of $4\, m/s^2$. The car will catch up with the bus after a time of:

$A$ train is moving at a constant speed $V$. When its driver observes another train in front of him on the same track and moving in the same direction with constant speed $u$. If the distance between the trains is $x$,what should be the minimum retardation of the train to avoid a collision?

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