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A bird flies for 4 seconds with a veloci...

A bird flies for 4 seconds with a velocity of `|t-2|m//sec.` In a straight line, where `t=` time in seconds. It covers a distance of

A

`4m`

B

`6m`

C

`8m`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
Plotting velocity `v` against time `t,` we get

Area under time `v-t` curve gives distanct.
Distance `=(1)/(2)xx2+(1)/(2)xx2xx=4m`
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Knowledge Check

  • A bird flies for 4 sec with a velocity of |t-2| m/s in a straight line, where t= time in seconds. It covers a distance of :

    A
    2m
    B
    4m
    C
    6m
    D
    8m

  • A body moving along a straight line traversed one third of the total distance with a velocity 4 m//sec in the first stretch. In the second strech the remaining distance is covered with a velocity 2 m//sec for some time t_(0) and with 4 m//s for the remaining time. if the average velocity is 3 m//sec find the time for which body moves with velocity 4 m//sec in second strecth:

    A
    `(3)/(2)t_(0)`
    B
    `t_(0)`
    C
    `2t_(0)`
    D
    `(t_(0))/(2)`

  • Figure shows the velocity time graph of a particle moving along straight line (v is m/s and t is in second). It average velocity in 20 seconds will be: .

    A
    `10 m//s`
    B
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    D
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