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Two particles $A$ and $B$ move with velocities $v_{1}$ and $v_{2}$ , respectively, along with the $x$ and $y$ axis. The initial separation between them is $d$ , as shown in the figure. Find the least distance between them during their motion.

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Important Questions on Kinematics

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Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 130

Two cars are moving in the same direction with a speed of

30 km h^{- 1}

. They are separated from each other by

5 km

. A third car is moving in the opposite direction and meets the two cars after an interval of

4 minutes

. What is the speed of the third car?

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Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 131

A bus is moving with a velocity 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 velocity should the scooterist chase the bus? (Neglect the size of the bus)

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Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 132

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

11 m s^{- 2}

, downwards. The time after which the coin will strike with the lift is

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Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 133

A police van moving on a highway with a speed of

30 km h^{- 1}

fires a bullet at a thief's car speeding away in the same direction with a speed of

192 km h^{- 1}

. If the muzzle speed of the bullet is

150 m s^{- 1}

, with what speed does the bullet hit the thief's car (as seen by the thief) according to the thief in the car?

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Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 134

A flag on a bus is fluttering in the North direction. The wind is blowing in the East direction. Which of the following statements is true?

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Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 135

For four particles

A

B

C

and

D

the velocities of one with respect to others are given as

{\vec{v}}_{DC}

20 m s^{- 1}

, towards the North,

{\vec{v}}_{BC}

20 m s^{- 1}

, towards the East and

{\vec{v}}_{BA}

20 m s^{- 1}

, towards the South. Then,

{\vec{v}}_{DA}

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Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 136

Two persons $P$ and $Q$ , start from points $A$ and $B$ , respectively, as shown in the figure. $P$ and $Q$ have speed $v = 12 m s^{- 1}$ , towards point $O$ . When the distance between $P$ and $Q$ is $120 m$ , then $Q$ increases its speed to $15 m s^{- 1}$ . Then, find out who will reach point $O$ first.

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Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 137

A man crosses the river perpendicular to river flow in time

t seconds

and travels an equal distance down the stream in

T seconds

. The ratio of the man's speed in still water to the speed of the river water will be

Two particles A and B move with velocities v1 and v2, respectively, along with the x and y axis. The initial separation between them is d, as shown in the figure. Find the least distance between them during their motion.

Important Questions on Kinematics

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Two particles $A$ and $B$ move with velocities $v_{1}$ and $v_{2}$ , respectively, along with the $x$ and $y$ axis. The initial separation between them is $d$ , as shown in the figure. Find the least distance between them during their motion.