Question

the graph below give the co-ordinate of the particle travelling along the x-axis as a function of time aim is the tangent to the curve at the starting moment and behan is the tangent at the end moment ITR 1 and ITR 1 theta 2 is equal to 120 degree the average velocity during the first 20 second is the average acceleration during first 22nd is the direction I kept for minus ICAP of acceleration during the first 10 seconds​

Answer 1

From which book is this question from ......please tell!!