Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 221

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Consider two cases.
$(i)$ A cart moves horizontally with constant velocity and a stone is projected vertically upwards.
$(ii)$ A cart slides down a smooth incline plane and a stone is projected in direction perpendicular to incline. Stone will fall in the cart

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Important Questions on Kinematics

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 222

A bird is flying towards east with a velocity

40 km / hr

and a train is moving with a velocity

40 km / hr

towards east. A man in train drops a food packet. The path of food packet as seen by bird till it falls on ground is (ignore air resistance)

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 223

A body

A

is going from South to North and body

B

is going from West to East with an identical velocity. Then the direction of the relative velocity of

A

with respect to

B

is-

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 224

A car

A

is going North-East at

80 km {hr}^{- 1} .

and another car

B

is going South-East at

60 km {hr}^{- 1} .

Then the direction of the velocity of

A

relative to

B

makes with the North and angle

α

such that

\tan

α

is-

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 225

A ship is travelling due east at

10 km h^{- 1}

. A ship heading

30 °

east of north is always due north from the first ship. The speed of the second ship in

km h^{- 1}

is

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 226

The speed of a boat is

5 km {hr}^{- 1}

in still water. If it crosses a river of width

1 km

along the shortest possible path in

15 m i n

. Then velocity of the river is-

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 227

A boat

P

is moving at

40 km {hr}^{- 1}

and another boat

Q

is moving at

20 km h^{- 1} .

Which one of the following is not a possible value for their relative velocity?

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 228

A boat man could row his boat with a speed $10 {ms}^{- 1}$ He wants to take his boat from $P$ to a point $Q$ just opposite on the other bank of the river flowing at a speed $4 {ms}^{- 1}$ . He should row his boat

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 229

A boat takes

2 h

to travel

8 km

and back in still water. If the velocity of water is

4 km h^{- 1}

, the time taken for going upstream

8 km

and coming back is