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Standard VI

Mathematics

Introduction to Statistics

A car is movi...

Question

A car is moving on a straight road due north with a uniform speed of $50 k m h^{- 1}$ when it turns left through $90^{\circ}$ . If the speed remains unchanged after turning, the change in the velocity of the car in the turning process is

50 \sqrt{2} k m / h S - W

direction

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50 \sqrt{2} k m / h N - W

direction

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50 k m / h

due west

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zero

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Solution

The correct option is A $50 \sqrt{2} k m / h S - W$ direction
Draw a labelled diagram.

Find change in the velocity.
Given,
${\to v}_{i} = 50^j$
${\to v}_{f} = - 50^i$
$Δ \to v = {\to v}_{f} - {\to v}_{i} = - 50^i - 50^j$
$| (\to Δ v) | = 50 \sqrt{2} k m / h, S W$

Final Answer: (B)

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Similar questions

Q. A motor car is going due north at a speed of 50 km/h. It makes a 90° left turn without changing the speed. The change in the velocity of the car is about
(a) 50 km/h towards west
(b) 70 km/h towards south-west
(c) 70 km/h towards north-west
(d) zero.

Q. Question 10 solution

10 . A c a r i s m o v i n g o n a s t r a i g h t r o a d d u e n o r t h w i t h a u n i f o r m s p e e d o f 50 k m h^{- 1} w h e n i t t u r n s l e f t t h r o u g h 90 ° . I f t h e s p e e d r e m a i n s u n c h a n g e d a f t e r t u r n i n g, t h e c h a n g e i n t h e v e l o c i t y o f t h e c a r i n t h e t u r n i n g p r o c e s s i s (A) z e r o (B) 50 \sqrt{2} k m h^{- 1} S - W d i r e c t i o n (C) 50 \sqrt{2} k m h^{- 1} N - W d i r e c t i o n (D) 50 k m h^{- 1} d u e w e s t .

Q. A bus is moving on a straight road towards North with a uniform speed of

50

km/h. If the speed remains unchanged after turning through

90^{o}

, the increase in the velocity of the bus in the turning process is?

Q. A car going due North at

20 \sqrt{2} m / s

turns right through an angle of

90^{\circ}

without changing speed. The change in velocity of car is

a car iss going due north at a speed of 50km/h . it makes a 90 degree left turn without changing the speed .the change in the velocity of the car is about ?

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Introduction to Statistics

Standard VI Mathematics

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A car is moving on a straight road due north with a uniform speed of 50 km h−1 when it turns left through 90∘. If the speed remains unchanged after turning, the change in the velocity of the car in the turning process is

The correct option is A 50√2km/h S−W directionDraw a labelled diagram. Find change in the velocity. Given, →vi=50^j →vf=−50^i Δ→v=→vf−→vi=−50^i−50^j |(→Δv)|=50√2 km/h,S W Final Answer: (B)

A car is moving on a straight road due north with a uniform speed of $50 k m h^{- 1}$ when it turns left through $90^{\circ}$ . If the speed remains unchanged after turning, the change in the velocity of the car in the turning process is

The correct option is A $50 \sqrt{2} k m / h S - W$ direction
Draw a labelled diagram.

Find change in the velocity.
Given,
${\to v}_{i} = 50^j$
${\to v}_{f} = - 50^i$
$Δ \to v = {\to v}_{f} - {\to v}_{i} = - 50^i - 50^j$
$| (\to Δ v) | = 50 \sqrt{2} k m / h, S W$

Final Answer: (B)