12 pts.] In the graph shown, what is the displacement from 0 to 2.0 s? 4 b. 40 m

Question

12 pts.] In the graph shown, what is the displacement from 0 to 2.0 s? 4 b. 40 m C. 60 m d. 80 m velocity (m/s) 20 10 time (s) 20 40 80 20 In the graph above, what is the displacement from 0 to 8,0 s? a. 20 m b. 40 m c. 60 m d. 80 m footballer) runs along a straight line at variable velocity As a part of her practice, a soccer player ( Find, using the plot of the velocity below, her average velocity between t -2.0s and t,-7.0s. a. 1.1 m/s 5. c. 0.45 m/s d. -0.45 m/s e. 0.30 m/s f -0.30 m/s v [m/s] t [s)

Explanation / Answer

4 ans

(a) ans

Given that

initial time t1=0 s

final time t2=2 sec

velocity v= 20 m/s

now we find the displacement

displacement X=area of V-t graph=1/2v[t2-t1]=1/2*20[2-0]=20 m

(b)ans

now we find the displacemrnt

displacement =area of the total v-t graph

=1/2*20*2+20*2+1/2*-20*2

=20+40-20

=40 m

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