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A $100 m$ long train crosses a man travelling at $5 km h^{- 1}$ , in opposite direction in $7.2$ seconds, then the velocity of train is

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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 15

An elevator is accelerating upward at a rate of

6 ft \sec^{2}

when a bolt from its ceiling falls to the floor of the lift (Distance

= 9.5

feet). The time (in seconds) taken by the falling bolt to hit the floor is (take

g = 32 ft \sec^{- 2}

)

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Previous Year Questions)>Q 16

210 metres

long train is moving due north with a speed of

25 m s^{- 1}

. A small bird is flying due south a little above the train with

5 m s^{- 1}

speed. The time taken by the bird to cross the train is

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Previous Year Questions)>Q 17

Two balls are thrown simultaneously,

(A)

Vertically upwards with a speed of

20 m s^{- 1}

from the ground and

(B)

vertically downwards from a height of

40 m

with the same speed and along the same line of motion. At which point will the balls collide? (take

g = 10 m s^{- 2}

)

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Previous Year Questions)>Q 18

A body

A

is thrown up vertically from the ground with velocity

v_{0}

and another body

B

is simultaneously dropped from a height

H

. They meet at a height

\frac{H}{2}

, if

v_{0}

is equal to

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Previous Year Questions)>Q 19

A boy is running on a levelled road with the velocity

(v)

with a long hollow tube in his hand. Water is falling vertically downwards with velocity

(u)

. At what angle to the vertical, should he incline the tube so that the water drops enter without touching its side:

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Previous Year Questions)>Q 20

A river flows from east to west with a speed of

5 m \min^{- 1}

. A man on the south bank of the river, capable of swimming at the rate of

10 m \min^{- 1}

in still water, wants to swim across the river in the shortest time. He should swim

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Previous Year Questions)>Q 21

A boat is sailing with a velocity

(3 \hat{i} + 4 \hat{j})

with respect to ground and water in the river is flowing with a velocity

(- 3 \hat{i} - 4 \hat{j})

. The relative velocity of the boat with respect to water is:

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Previous Year Questions)>Q 22

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})

A 100 m long train crosses a man travelling at 5 km h-1, in opposite direction in 7.2 seconds, then the velocity of train is

Important Questions on Kinematics

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A $100 m$ long train crosses a man travelling at $5 km h^{- 1}$ , in opposite direction in $7.2$ seconds, then the velocity of train is