Question

the position of a particle moving along x axis varies with time as shown in figure the average acceleration of particle in time interval t = 0 to t = 8 s is

Answer 1

slope it tan(theta) of x-t curve gives us velocity
therefore find slope at t=0 gives vel v1 and slope at t=8 gives final velocity v2
now accn is equal to V2-V1/t2-t1
and also v2 is -ve bcz slope at t=8 is-ve
therefore v2=-20 and v1 =20 put values
in formula we get a= -5
see the pic for solution
i hope it works

Answer 2

Answer 2

Explanation:

I add pic below hope that it will helpp