Question

A. 1.5 m/s^2
B. 1m/s^2
C. 2m/s^2
D. 0.5m/s^2

Answer 1

Answer:

Explanation:

Given-

Initial time(t$_{1$)=7s

Final time(t$_2$)=9s

overall time(t)=t$_2$-t$_{1$

                      =9s-7s

                      =2s

Initial distance(d$_{1$)=3cm

Final distance(d$_2$)=7cm

overall distance(d)=d$_2$-d$_{1$

                      =7cm-3cm

                      =4cm

To Find-

Speed(s)=?

Calculations-

s=$\frac{d}{t}$

$\frac{4}{2} cm/s\\\\=>2cm/s$

Answer 2

I think B is correct answer