Question

A body has an eastward velocity of 40ms-1 at t=0 at point O and a westward acceleration of 8ms-2.The speed of the body is 40 ms-1 again after t=​

Answer 1

Answer:

10s

Explanation:

East ward velocity=40m/s

West ward acceleration=8 m/s^2 it means deccelaration

as the body is deccelarating it will move toward west

after some time

final velocity 40m/s but west ward

so

v=u +at

-40m/s=40m/s - 8m/s^2 . t

=>8m/s^2 .t =80 m/s

=>t = 10 s