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A stone is thrown upwards from a tower with a velocity $50 {ms}^{- 1}$ . Another stone is simultaneously thrown downwards from the same location with a velocity $50 {m s}^{- 1} .$ When the first stone is at the highest point, the relative velocity of the second stone w.r.t. the first stone is (assume that second stone has not yet reached the ground):

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Important Questions on Kinematics

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 202

A thief is running away on a straight road in a jeep moving with a speed of

9 m s^{- 1}

. A policeman chases him on a motorcycle moving at a speed of

10 m s^{- 1}

. If the instantaneous separation of the jeep from the motorcycle is

100 m

, how long will it take for the policeman to catch the thief?

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 203

A body is thrown up in a lift with a velocity

u

relative to the lift and the time of flight is found to be

t

. The acceleration with which the lift is moving up is

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 204

Two trains

A

and

B

, which are

100 km

apart, are travelling towards each other on different tracks with each having an initial speed of

50 km h^{- 1}

. The train

A

accelerates at

20 km h^{- 2}

and the train

B

retards at the rate of

20 km h^{- 2}

. The distance covered by train

A

when they cross each other is

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 205

A bus is moving with a speed of

10 m s^{- 1}

on a straight road. A scooterist wishes to overtake the bus in

100 s

. If the bus is at a distance of

1 km

from the scooterist, with what speed should the scooterist chase the bus?

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 206

120 m

long train is moving towards west with a speed of

10 m / s

. A bird flying towards east with a speed of

5 m / s

crosses the train. The time taken by the bird to cross the train will be -

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 207

A particle is thrown up inside a stationary lift of sufficient height. The time of flight is

T

. Now it is thrown again with same initial speed

v_{0}

with respect to lift. At the time of second throw, lift is moving up with speed

v_{0}

and uniform acceleration g upward (the acceleration due to gravity). The new time of flight is:

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 208

Two men $P$ and $Q$ are standing at corners $A$ and $B$ of square $A B C D$ of side $8 m .$ They start moving along the track with constant speed $2 m s^{- 1}$ and $10 m s^{- 1}$ respectively. Find the time when they will meet for the first time.

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 209

A coin is released inside a lift at a height of

2 m

from the floor of the lift. The height of the lift is

10

m .

The lift is moving with an acceleration of

9

m / s^{2}

downwards. The time after which the coin will strike with the floor of lift is :

(g = 10 m / s^{2})

Important Questions on Kinematics

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