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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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Important Questions on Kinematics

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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})

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 210

A man in a balloon throws a stone downwards with a speed of $5 m s^{- 1}$ with respect to the balloon. The balloon is moving upwards with a constant acceleration of $5 m s^{- 2} .$ Then velocity of the stone relative to the man after $2$ second is: