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CBSE-XI-Physics

03: Rest and Motion: Kinematics

with Solutions - page 2
Qstn# A-11 Prvs-QstnNext-Qstn
  • #11
    In figure shows the x coordinate of a particle as a function of time. Find the sings of vx and ax at t = t1, t = t2 and t = t3.
    Figure
    Ans : Slope of the x-t graph gives the velocity and change in the slope gives the acceleration.
    At t = t1,
    Slope = Positive ⇒ Velocity = Positive
    Slope is increasing ⇒ Acceleration = Positive
    At t = t2,
    Slope = Zero ⇒ Velocity = Zero
    Slope is increasing ⇒ Acceleration = Negative
    At t = t3,
    Slope = Negative ⇒ Velocity = Negative
    Slope is increasing ⇒ Acceleration = Positive