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

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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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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 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

?

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>Assignment>Q 1

A person moves from $A$ to $D$ along the circular path $A, B, C, D$ as shown in $\sqrt{2} s .$ Then, the average velocity, of the person is

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

A man moves from station

A

to

B

with speed

5 km h^{- 1}

for half time and with speed

15 km h^{- 1} .

for remaining half time. The average speed of the man over the entire journey is

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>Assignment>Q 4

A body is projected vertically upward with speed

u .

The distance travelled by body in the last second of upward journey is same as that of

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>Assignment>Q 5

A train

100 m

long travelling at

40 m s^{- 1} .

overtakes another train

200 m

long travelling at

30 m s^{- 1} .

in the same direction. The time taken by the first train to pass the second train is