A graph of position versus time for a certain particle moving along the x-axis i

Question

A graph of position versus time for a certain particle moving along the x-axis is shown in the figure below. Find the average velocity in the following time intervals. 0 to 2.00 s m/s 0 to 4.00 s m/s 2.00 s to 4.00 s Your response differs from the correct answer by more than 10%. Double check your calculations, m/s 4.00 s to 7.00 s Your response differs from the correct answer by more than 10%. Double check your calculations, m/s 0 to 8.00 s m/s A motorist drives north for 30.0 minutes at 93.5 km/h and then stops for 15.0 minutes. He then continues north, traveling 130 km in 2.20 h. What is his total displacement? km What is his average velocity?

Explanation / Answer

c) 2 to 4 second

D = displacement = Xf - Xi = 5 - 10 = - 5 m

t = time = 4 - 2 = 2 sec

average velocity is given as

Vavg = D/t = - 5/2 = - 2.5 m/s

d) 4 to 7 sec :

D = displacement = Xf - Xi = - 6 - 5 = - 11 m

t = time = 7 - 4 = 3 sec

average velocity is given as

Vavg = D/t = - 11/3 = - 3.67 m/s

e)

0 to 8 sec :

D = displacement = Xf - Xi =0 - 0 = 0 m

t = time = 8 - 0 = 8 sec

average velocity is given as

Vavg = D/t = 0 /8= 0 m/s

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