At time , a car moving along a straight line has velocity . It slows down with…

PHYSICS · Multi correct · ISC · Physics · Kinematics · Kinematics

Problem

At time

t=0

, a car moving along a straight line has velocity

16\,\text{m}\,\text{s}^{-1}

. It slows down with acceleration

a=-0.5t\,\text{m}\,\text{s}^{-2}

, where

t

is in seconds. Mark the correct statement(s). (1) The direction of velocity changes at

t=8\,\text{s}

. (2) The distance travelled in

4\,\text{s}

is approximately

58.67\,\text{m}

. (3) The distance travelled by the particle in

10\,\text{s}

94\,\text{m}

. (4) The speed of the particle at

t=10\,\text{s}

9\,\text{m}\,\text{s}^{-1}