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A river is flowing at the rate of $6 km h^{- 1}$ . A swimmer swims across the river with a velocity of $9 km h^{- 1}$ with respect to water. The resultant velocity of the man will be in $(km h^{- 1})$ :-

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Important Questions on Kinematics

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Previous Year Questions)>Q 23

A man wishes to swim across a river

0.5 km

wide. If he can swim at the rate of

2 km h^{- 1}

in still water and the river flows at the rate of

1 km h^{- 1}

. The angle made by the direction (with respect to the flow of the river) along which he should swim to reach a point exactly opposite his starting point, should be

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Previous Year Questions)>Q 24

A boat-man can row a boat to make it move at a speed of

10 km h^{- 1}

, in still water. The river flows steadily at the rate of

5 {km h}^{- 1}

, and the width of the river is

2 km

. If the boat-man to across the river along with the minimum distance of approach then the time elapsed in rowing the boat will be:

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Previous Year Questions)>Q 25

A bird is flying towards the south with a velocity

40 km h^{- 1}

and a train is moving with a velocity

40 km h^{- 1}

towards the east. What is the velocity of the bird with respect to an observer on the train?

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Previous Year Questions)>Q 26

A bird is flying at a speed of

40 km h^{- 1}

in the north direction. A train is moving at a speed of

40 km h^{- 1}

in the west direction. A passenger sitting in the train will see the bird moving with velocity:

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Previous Year Questions)>Q 27

A particle is moving with a velocity of

10 m s^{- 1}

towards the east. After

10 s

its velocity changes to

10 m s^{- 1}

towards north. Its average acceleration is

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Previous Year Questions)>Q 28

A man is walking on a road with a velocity of

3 km h^{- 1}

when suddenly, it starts raining velocity of rain is

10 km h^{- 1}

in a vertically downward direction, the relative velocity of the rain with respect to man is:

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Previous Year Questions)>Q 29

Two particles are separated by a horizontal distance $x$ as shown in the figure. They are projected as shown in the figure with different initial speeds. The time after which the horizontal distance between them becomes zero is:

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Previous Year Questions)>Q 30

Let

\vec{r_{1}} (t) = 3 t \hat{i} + 4 t^{2} \hat{j}

and

\vec{r_{2}} (t) = 4 t^{2} \hat{i} + 3 t \hat{j}

represent the positions of particles

1

and

2

, respectively, as functions of time

t

;

\vec{r_{1}} (t)

and

\vec{r_{2}} (t)

are in

metres

and

t

is in

seconds

. The relative speed of the two particles at the instant

t = 1 s

, will be

A river is flowing at the rate of 6 km h-1. A swimmer swims across the river with a velocity of 9 km h-1 with respect to water. The resultant velocity of the man will be in km h-1:-

Important Questions on Kinematics

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A river is flowing at the rate of $6 km h^{- 1}$ . A swimmer swims across the river with a velocity of $9 km h^{- 1}$ with respect to water. The resultant velocity of the man will be in $(km h^{- 1})$ :-