Question

The following graph describes the motion of a girl who travels to meet her friend

a) How much time did she take to reach her friend's house?
b) What distance did she travel in the first 12 minutes?
c) During which time intervals was she moving towards her own house?
d) For how many minutes was she at rest during her entire journey?
e) Calculate the velocity by which she returned home.​

Answer 1

Answer:

a)

t=14\ mint=14 min

b)

d=20+20+20=60\ md=20+20+20=60 m

c)

\text{from 8 to 10 min and from 12 to 14 min}from 8 to 10 min and from 12 to 14 min

d)

t=(4-2)+(8-6)+(12-10)=6\ mint=(4−2)+(8−6)+(12−10)=6 min

e)

v=\frac{50}{2}=25\frac{m}{min}v=

2

50

=25

min

m