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Correct your friend who says "The car ro...

Correct your friend who says "The car rounded the curve at a constant velocity of 70 km/h".

Text Solution

Verified by Experts

"The car rounded the curve at a constant speed of 70km/h".
Reason : In a circular motion, speed remains constant but velocity changes.
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Knowledge Check

  • The decleration of a car travelling on astraight highway is a function of its instantaneous velocity 'v' given by w =asqrtv , where 'a' is a constant . If the initial velocity of the car is 60 km/hr, the distance the car will travel and the time it takes before it stops are

    A
    2/3m,1/2s
    B
    3/2am, 1/2a s
    C
    3a/2 m, a/2s
    D
    2/3a m, 2/as

  • The deceleration of a car traveling on a straight highway is a function of its instantaneous velocity v given by omega = a sqrt (v) where a is a constant . If the initial velocity of the car is 60 km/h , the distance of the car will travel and the time it takes before it stopes are

    A
    `2/3 m,1/2 s`
    B
    `3/( 2a) m, (1) /( 2a) s`
    C
    `(3a)/(2) m, ( a) /(2)s`
    D
    `(2)/(3a) m, 2/ a s`

  • A person is travelling in a train moving due south with velocity 80 kmph his friend Q is travelling in a car moving due west with velocity 60 kmph. Q finds that his friend P is travelling with velocity

    A
    200 kmph `tan^(-1)` (4/3) NE
    B
    100 kmph `tan^(-1)` (4/3) E of S
    C
    100 kmph S - E
    D
    100 kmph `tan^(-1)` (4/3) S of E

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