Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>EXERCISE>Q 16

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A particle starting from rest undergoes a rectilinear motion with acceleration a. The variation of a with time $t$ is shown below. The maximum velocity attained by the particle during its motion is

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Important Questions on Motion in a Straight Line

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>EXERCISE>Q 20

The displacement of a body is given by

s = \frac{1}{2} g t^{2},

where

g

is acceleration due to gravity. The velocity of the body at any time

t

is

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>EXERCISE>Q 23

A ball is thrown vertically upward attains a maximum height of

45 m .

The time after which velocity of the ball become equal to half the velocity of projection?

(use g = 10 m s^{- 2})

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>EXERCISE>Q 24

A car travelling with a velocity of

80 km h^{- 1}

slowed down to

44 km h^{- 1}

in

15 s .

The retardation is

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>EXERCISE>Q 25

A person driving a car with a speed

72 km h^{- 1},

suddenly sees a boy crossing the road. If the distance moved by car, before the person applies brakes is

5 m,

the reaction time of the person is

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>EXERCISE>Q 27

Two objects

A

and

B

are moving with speeds

v_{A}

and

v_{B}

respectively in the same direction. The magnitude of relative velocity of

A w . r . t . B

is

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>EXERCISE>Q 29

The relative velocity of two objects

A

and

B

is

10 m s^{- 1} .

If the velocity of object

A

is

40 m s^{- 1} .

then the velocity with which

B

is moving is (assume both objects are moving in same direction)

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>EXERCISE>Q 32

A boat takes two hours to travel

8 km

down and

8 km

up the river when the water is still. How much time will the boat take to make the same trip when the river starts flowing at

4 kmph ?

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>EXERCISE>Q 35

Taxi leave station

X

for station

Y

every

10 \min

. Simultaneously, a taxi also leaves station

Y

for station

X

every

10 \min

. The taxis move at the same constant speed and go from

X

and

Y

or vice-versa in

2 h

. How many taxies coming from the other side will meet each taxi in route from

Y

and

X

?