Question

The speed of a car is increased

continuously from 10 m/s to 20 m/s

in 1 minute. It average speed is.​

Answer 1

Hi !

It speed is 1/2 m/s

Hope this helps

Answer 2

Here,

u = 10 m/s , v = 20 m/s , t = 60 s

By Newton's first equation of motion,

==> v = u + at

==> 20 = 10 + 60a

==> 60a = 10

==> a = 1/6 m/s²

By Newton's third Equation of motion:

==> 2as = v² - u²

==> 2×1/6×s = 400 - 100

==> s/3 = 300

==> s = 900 m

Average speed = Total Distance / Total Time

==> Avg. Speed = 900 / 60

==> Avg. Speed = 15 m/s

Hence, The average speed of the car is 15 m/s