Question

A car travels from rest with a constant acceleration a for t seconds. What is the average speed of the car for its journey, if the car moves along a straight road?​

Answer 1

Answer:-

v=2at

Initial speed of car  u=0

Distance covered by car in t seconds is given by second equation of motion,   

S=ut+21at2

⟹ S=21at2       (∵u=0)

Average speed of car = total timetotal distance

vavg=tS=t21at2=2at

Answer 2

Step-by-step explanation:

Initial speed of car

u=

0

Distance covered by car in t seconds is given by second equation of motion,

⟹

S=

S= ut+

2

1

at

2

2

1

at

2

(∵

u=

0)

Average speed of car =

total time

total distance

v

avg

=

t

S

=

t

2

1

at

2

=

2

at