Question

Please solve this question

Answer 1

distance/time than answer is come

Answer 2

1) initial=0 final=4 for distance and time both
hence speed=(4-0)/4=1cm/s.
2)initial=4 final=4 for distance ,for time=(7-4)=3
hence speed=(4-4)/3=0cm/s.
using formula speed=total distance/total time taken.